Example

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

Question

$$4 \times - { 3 }^{ 3 } -5 \times - { 3 }^{ 2 } +7 \times -3+10$$

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