Y add 1.97 div sub add mul -0.095 div div x_1 add mul 66.10000000000001 x_0 mul -0.315 mul add mul 2.49 x_3 mul -4.2700000000000005 pow2 add 2.31 mul -30.8 x_1 x_4 x_4 mul 67.0 x_3 mul 8.53 x_4 sin add -0.23800000000000002 mul -11.3 x_2