Y add -0.598 sub mul -0.341 pow3 add 0.505 mul 69.10000000000001 x_3 sub mul -8.540000000000001 x_4 mul -35.5 mul pow2 add 0.96 mul -48.400000000000006 mul tan add -0.2 mul -6.640000000000001 x_3 pow3 add -0.4 mul -0.657 x_2 sub mul -1.37 x_0 mul 4.5 mul x_3 x_1