wxdraw3d(
xrange = [-2, 4], yrange = [-1, 5], zrange = [0, 6],
color = red,
implicit(fsol(x,y,z) - 1, x, -2, 4, y, -1, 5, z, 0, 6),
color = blue,
implicit(fsol(x,y,z) - 4, x, -2, 4, y, -1, 5, z, 0, 6),
color = green,
implicit(fsol(x,y,z) - 10, x, -2, 4, y, -1, 5, z, 0, 6)