Y add 3.65 mul div mul inv add 0.445 mul 0.9 x_3 add add mul -0.667 pow3 add -9.78 mul 56.7 x_2 mul 68.2 inv add 0.509 mul -0.859 x_1 mul -1.9000000000000001 abs add -61.400000000000006 mul -0.08600000000000001 x_2 x_0 x_4