Variables
	float64 x1 in [-100, 100],
	float64 x2 in [-100, 100],
	float64 x3 in [-100, 100],
	float64 x4 in [-100, 100];
Expressions
	trid rnd32 = (((((((x1 - 1) * (x1 - 1)) + x2 * x1) - ((x2 - 1) * (x2 - 1))) + (x3 * x2)) - ((x3 - 1) * (x3 - 1))) + (x4 * x3)) - ((x4 - 1) * (x4 - 1));
