Y add 20.1 div x_0 sub mul 9.600000000000001 mul x_2 pow3 add mul 1.0 x_3 add mul -0.8280000000000001 x_2 mul 1.21 exp add 61.7 mul 0.535 x_2 mul 24.400000000000002 pow3 add mul 5.5600000000000005 x_3 mul -0.9 div x_3 x_1