Y add -1.1300000000000001 div add add mul -8.05 inv add 91.0 mul 0.8 x_3 mul -9.0 div sub mul 6.11 x_4 mul -13.700000000000001 x_1 x_1 add mul 5.11 x_0 sub mul -83.80000000000001 x_2 mul 16.1 x_3 abs add 0.486 mul 73.5 x_0