Example

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

Question

$$9 { \left( { x }^{ 2 } -2x+1 \right) }^{ 2 } -16 { \left(9 { x }^{ 2 } +6x+1 \right) }^{ 1 }$$

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