Y add 16.8 mul x_0 div pow2 add 6.1000000000000005 mul 25.900000000000002 x_1 sub mul -0.31 sqrt add add mul 0.393 pow2 add -34.4 mul 1.35 x_1 mul 8.09 x_3 mul -7.46 x_3 sub add mul 4.59 x_3 add mul 1.1400000000000001 x_2 mul 0.41000000000000003 x_4 mul -1.41 x_3