That is useful but sure would be even more useful if it let you define functions and call them.

Also the output is pretty gross, wish it had an option for a statically typed language.

Also wtf? It doesn't have sqrt? Have to write it in power form..sigh

Also seems to also not grok values with decimal points as the power, so you have to write it as a fraction..sigh..why math people..why?

Also why can you only select the output for 1 value at a time? For instance if we have a 3d position, we want gradient for x/y/z not just 1 of them..