Instructions :

You don't need to install anything, simply use the virtual mathematics keyboard below to type your equations. You can use this online keyboard in alternation with your physical keyboard, for example you can type regular numbers and letters on your keyboard and use the virtual math keyboard to type the mathematical characters. You can hold [Shift] for the upper case Greek characters. Once you are done, you can save to file or copy [Ctrl]+[c] & paste [Ctrl]+[v] it to other documents or to your email.