- 2 a ^ { 2 } \cdot ( \frac { 1 } { 2 } a b + b ^ { 2 } ) \quad \text { (4) } \frac { 1 } { 2 } x y ^ { 2 } \cdot ( \frac { 2 } { 3 } x ^ { 2 } y - 6 x y )
Evaluate
-\frac{4b\left(x-9\right)\left(a+2b\right)y^{3}\left(ax\right)^{2}}{3}
Expand
-\frac{8\left(ab\right)^{2}\left(xy\right)^{3}}{3}-\frac{4b\left(axy\right)^{3}}{3}+12bx^{2}\left(ay\right)^{3}+24y^{3}\left(abx\right)^{2}
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