Y add -0.5 mul x_2 add mul 0.063 mul add mul 56.800000000000004 x_3 mul -68.7 mul mul x_1 mul x_3 abs add -0.848 mul 4.0200000000000005 x_1 x_3 x_1 mul -0.324 abs add -9.92 mul -82.60000000000001 mul x_4 x_0