若式子4-3(x+2)与4(x-3)-4的值相等,求代数式2x^3+4x-1/3x^2-（x+3x^2-2x^3)

4-3(x+2)=4(x-3)-4
4-3x-6=4x-12-4
4x+3x=4-6+12+4
7x=14
x=2
2x^3+4x-1/3x^2-（x+3x^2-2x^3)
=2x^3+4x-1/3x^2-x-3x^2+2x^3
=4x^3-10/3x^2+3x
=4×8-(10/3)×4+3×2
=38/3