Example

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

Question

$$(A+B+C+D)-d=( { 4 }^{ 2 } + { 5 }^{ 2 } + { 6 }^{ 2 } + { 11 }^{ 2 } )-(11 \times 11)$$

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