Free online math calculators for your site

WARNING! Do not change the widget code, otherwise it will stop working.

<style>input[type='button']#m4uExec {background: rgb(0,123,255); color: rgb(255, 255, 255); height: 31px; border: 1px transparent; text-align: center; padding: 4px 12px; border-radius: 4px; outline: none;} input[type='button']#m4uExec:hover {cursor: pointer;}input[type='text'] {border: 1px solid rgb(0,123,255); border-radius: 4px;}a.m4uLink {color: rgb(0,123,255); text-decoration: none; line-height: 1px;} a.m4uLink:hover {text-decoration: underline;}a#m4uHeaderLink {color: white; text-decoration: none;} a#m4uHeaderLink:hover {text-decoration: none;}div#m4uWidget {border-radius: 5px; overflow: hidden; font-family: Segoe UI; text-align: left; box-shadow: 0px 0px 20px rgba(30,30,30,0.5)}div#m4uWidgetName {background-color: rgb(0,123,255); color: White; font-size: 16px; border-top-left-radius: 4px; border-top-right-radius: 4px; padding: 3px 0px 3px 20px;}div#m4uWidgetTask {background-color: rgb(241,241,241); padding: 20px 20px 10px 20px; border-left: 1px solid rgb(222,222,222); border-right: 1px solid rgb(222,222,222); }div#m4uWidgetResult {display: none; border-top: 1px solid rgb(222,222,222); border-right: 1px solid rgb(222,222,222); border-left: 1px solid rgb(222,222,222);}div#m4uWidgetResultFrame { }div#m4uWidgetBottom {text-align: center; padding: 10px 20px; font-size: 12px; background-color: rgb(241,241,241); border: 1px solid rgb(222,222,222); border-bottom-right-radius: 5px; border-bottom-left-radius: 5px; }div#m4uWidgetResultError {padding: 10px 20px 10px 20px; display: none; border-top: 1px solid rgb(222,222,222); border-right: 1px solid rgb(222,222,222); border-left: 1px solid rgb(222,222,222);}span.m4uError {font-size: 14px; font-weight: 500; color: rgb(151, 7, 7); background-color: rgb(255, 238, 238); padding: 5px; border: 1px solid rgb(151, 7, 7); border-radius: 5px;}span.m4uVar {font-family: Times New Roman; font-size: 16px; font-style: italic; margin: 0px 3px 0px 3px;}span.m4uSymbol {font-size: 20px; margin: 0px 3px 0px 3px;}input[type="text"]#m4uFunc {width: 250px; height: 30px; border-radius: 4px; outline: none;}select#m4uIntVar {height: 30px; border: 1px solid rgb(0,123,255); border-radius: 4px; outline: none;} select#m4uIntVar:hover {cursor: pointer;}span.m4uDiffSymbol {font-size: 16px; margin-left: 2px;}</style><div id="m4uWidget"><div id="m4uWidgetName"><a id="m4uHeaderLink" href="https://mathforyou.net/online/calculus/integral/indefinite/">Решение неопределенных интегралов</a></div><div id="m4uWidgetTask"><div><span class="m4uSymbol">∫</span><input type="text" id="m4uFunc" value="x*sin(5x)" onkeydown="m4uTbChanged();" /><span class="m4uDiffSymbol">d</span><select id="m4uIntVar" onchange="m4uTbChanged();"><option value="x">x</option><option value="y">y</option><option value="t">t</option><option value="z">z</option><option value="r">r</option><option value="s">s</option><option value="u">u</option><option value="w">w</option><option value="p">p</option><option value="f">f</option><option value="h">h</option><option value="v">v</option></select></div><br /><input type="button" id="m4uExec" value="Получить ответ" onclick="m4uGo();" /></div><div id="m4uWidgetResult"></div><div id="m4uWidgetResultError"></div><div id="m4uWidgetBottom"><a id="m4uWidgetLink" class="m4uLink" href="https://mathforyou.net/widgets/">Установить калькулятор на свой сайт</a></div></div><script type="text/javascript">function getM4uHandle(elementId){return document.getElementById(elementId);}function m4uRFV(field,fieldValidator,message){if(field.value==""||field.value==null){fieldValidator.innerHTML=message;getM4uHandle("m4uWidgetResultError").style.display="block";return false;}else{fieldValidator.innerHTML="";getM4uHandle("m4uWidgetResultError").style.display="none";return true;}}function m4uHRefsCheck(){var result=getM4uHandle('m4uWidgetResultError');var messageLink="<p><span class='m4uError'>Ошибка! Код виджета был модифицирован</span></p>";var check;check=m4uLFV(getM4uHandle('m4uHeaderLink'),'https://mathforyou.net/online/calculus/integral/indefinite/','Решение неопределенных интегралов',result,messageLink);check=check&&m4uLFV(getM4uHandle('m4uWidgetLink'),'https://mathforyou.net/widgets/','Установить калькулятор на свой сайт',result,messageLink);return check;}function m4uLFV(field,lValue,tValue,fieldValidator,message){var href=(field.href[field.href.length-1]=='/')?(field.href.substring(0,field.href.length-1)):(field.href);lValue=(lValue[lValue.length-1]=='/')?(lValue.substring(0,lValue.length-1)):(lValue);if(href!=lValue||field.innerHTML!=tValue){fieldValidator.innerHTML=message;getM4uHandle("m4uWidgetResultError").style.display="block";return false;}else{fieldValidator.innerHTML="";getM4uHandle("m4uWidgetResultError").style.display="none";return true;}}function m4uTbChanged(){getM4uHandle("m4uWidgetResult").innerHTML="";getM4uHandle("m4uWidgetResult").style.display="none";getM4uHandle("m4uWidgetResultError").style.display="none";}function getM4uPartnerId() {return 41;}function m4uFormCheck(){var result=getM4uHandle('m4uWidgetResultError');var check=m4uHRefsCheck();if(check){check=check&&m4uRFV(getM4uHandle("m4uFunc"),result,"<p><span class='m4uError'>необходимо ввести подынтегральную функцию</span></p>");}return check;}function m4uGo(){if(m4uFormCheck()){var m4uFunc=encodeURIComponent(getM4uHandle("m4uFunc").value);var m4uIntVar=encodeURIComponent(getM4uHandle("m4uIntVar").value);var hRef1=encodeURIComponent(getM4uHandle("m4uHeaderLink").href);var hRef3=encodeURIComponent(getM4uHandle("m4uWidgetLink").href);var resultHandle=getM4uHandle("m4uWidgetResult");var query="https://mathforyou.net/widgets/api/?e0=" + m4uFunc + "&v0=" + m4uIntVar + "&sid=7" + "&l1=" + hRef1 + "&l3=" + hRef3 + "&pid=" + getM4uPartnerId();resultHandle.innerHTML="<iframe frameborder='0' style='padding: 15px;' width='100%' height='300' id='m4uWidgetResultFrame' src=''></iframe>";getM4uHandle("m4uWidgetResultFrame").src=decodeURI(query);resultHandle.style.display="block";}}</script>

Copy the above code and paste it on your page in the place where you want the widget to be.