Example

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

Question

$$- 6 x ^ { 2 } + 7 x - 2 - 5 x ^ { 2 } + 6 + 12 x$$

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