Y add 39.1 div add mul 3.5500000000000003 mul sub mul 0.06 tan add -0.23 mul -0.713 x_3 mul -86.80000000000001 x_1 div x_4 tan add 0.642 mul 0.41000000000000003 x_1 mul 0.18 x_4 add mul 23.1 x_0 mul -3.91 x_2