0.108 * [progress]: [Phase 1 of 3] Setting up.
0.001 * * * [progress]: [1/2] Preparing points
0.223 * * * [progress]: [2/2] Setting up program.
0.231 * [progress]: [Phase 2 of 3] Improving.
0.231 * [simplify]: Simplifying:
  (- wj (/ (- (* wj (exp wj)) x) (+ (exp wj) (* wj (exp wj)))))