Y add 0.666 add mul -83.5 div mul add sub mul -0.095 x_1 add mul 0.018000000000000002 x_3 sub mul -2.68 x_7 mul 38.900000000000006 pow2 add 0.531 mul 0.367 x_8 sub mul 0.138 pow3 add 83.60000000000001 mul -4.14 x_5 mul -85.7 x_4 x_7 sub mul 24.6 div mul x_2 x_2 x_0 mul -3.8200000000000003 x_3 mul 6.43 x_6