Click and drag to rotate. Press "e" to see the formula used to create the graph. Press "e" again to hide the formula. I wanted to try an idea of swapping back to a wireframe for rotation and then showing the faces when in a set position to try and increase the number of faces that I could display.
01-16-2019 Updated to use Pen Text Ultra from @-Rex- https://scratch.mit.edu/projects/262564340/ Runs much faster on sulfurous https://sulfurous.aau.at/~sulfurous/#227104140 Based on my wireframe project https://scratch.mit.edu/projects/133181560/ Arithmetic evalutator from @griffpatch (very cool project) 3d Projection based on @Raucket projects Some equations taken from the MathMod program https://sourceforge.net/projects/mathmod/ and some just from google searches.