2×2+7×2×3+3×3怎么化简2×2+7×2×3+3×3=4+42+9=46+9=55
2×2+7×2×3+3×3=2*2+4*2*3+3*3+3*2*3=2*2+2*2*6+3*3*3=2*2*7+3*3*3=28+27=55
