Y add 0.216 mul mul x_0 sub mul -0.9 pow2 add -8.200000000000001 mul -0.9 x_0 mul 99.5 abs add -0.09 mul -27.700000000000003 x_2 sub mul -1.1500000000000001 x_3 sub mul 83.9 x_1 mul -91.10000000000001 x_1