2(x+y)×5(x+y)^2 ×3(x+y)^3=

问题描述:

2(x+y)×5(x+y)^2 ×3(x+y)^3=

2(x+y)×5(x+y)^2 ×3(x+y)^3=2×5×3×(x+y)^(1+2+3)=30(x+y)^6