Example

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

Question

$$5 { x }^{ 2 } -8 { x }^{ 2 } +7 { x }^{ 2 } +6 { x }^{ 2 } +4 { x }^{ 2 }$$

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