Example

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

Question

$$(x+y+3)^{3}$$

Expand

$x^{3}+9x^{2}+3xy^{2}+18xy+27x+y^{3}+9y^{2}+3yx^{2}+27y+27$

Evaluate

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

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