Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$(9h+3k) { \left(3h+k \right) }^{ 2 }$$

Evaluate

$3\left(3h+k\right)^{3}$

Expand

$81h^{3}+27hk^{2}+3k^{3}+81kh^{2}$

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