Y add -8.28 sub mul 3.59 div pow2 add -17.400000000000002 mul -5.24 x_2 add mul -0.867 mul pow2 add 0.128 mul -0.664 x_4 mul abs add 4.86 mul 0.031 x_3 x_2 sub mul 83.4 x_4 mul 0.126 x_1 mul -0.598 inv add -0.632 mul -4.4 x_0