Example

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

Question

$${ \left(x-2y+3 \right) }^{ 2 } + { \left(x+2y-3 \right) }^{ 2 }$$

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