Example

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

Question

$$2 x ^ { 2 } - \{ 4 ( 2 x - 2 ) - ( 4 x ^ { 2 } - 3 + 2 ) \}$$

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