Example

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

Question

$$(aHb)^{2}-Hr^{2}$$

Evaluate

$H\left(H\left(ab\right)^{2}-r^{2}\right)$

Expand

$\left(Hab\right)^{2}-Hr^{2}$

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