https://turbowarp.org/1390478161?hqpen Really recommend turbowarp. ok uhm.. here we go. You type the equations in f(x+y) or something like that. For example, "x^2*y^2" works! z is basically the y= part, you don't include z or z= in it. WASD is movement, arrow keys for rotation, and - and + are zoom. H for hiding axis
Me; UNEMPLOYED. truck; yes took a LOT longer than I thought, very complicated.