Quickly use MathForm by dragging the following link into your bookmarks.
Then go to a Google Form, and click the bookmark.
If you don't want to add a bookmark to your bar, you can copy/paste the code in.
Copy the following. Go to the tab with your form, and replace the url with javascript:. Then paste the following in, and hit enter.
javascript:(function(e,a,g,h,f,c,b,d){if(!(f=e.jQuery)||g>f.fn.jquery||h(f)){c=a.createElement("script");c.type="text/javascript";c.src="//ajax.googleapis.com/ajax/libs/jquery/"+g+"/jquery.min.js";c.onload=c.onreadystatechange=function(){if(!b&&(!(d=this.readyState)||d=="loaded"||d=="complete")){h((f=e.jQuery).noConflict(1),b=1);f(c).remove()}};a.documentElement.childNodes[0].appendChild(c)}})(window,document,"1.11.2",function($,L){var inDev = false; var commit = "be6e436ca1"; var subdomain = inDev ? "" : "cdn."; var path = inDev ? "master" : commit; var loaded = function(){window.mathForm = new MathForm($); window.mathForm.render("mathQuill").subdomain(subdomain).path(path).google("[Math]")}; $.getScript("https://"+subdomain+"rawgit.com/CodeLenny/MathForm/"+path+"/build/MathForm.js").done(loaded); });