Example

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

Question

$$(a+b+c)(a+b+d)$$

Expand

$a^{2}+2ab+ac+ad+b^{2}+bc+bd+cd$

Evaluate

$\left(a+b+c\right)\left(a+b+d\right)$

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