Example

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

Question

$$(2x+y+3z)^{2}$$

Expand

$4x^{2}+4xy+12xz+y^{2}+6yz+9z^{2}$

Evaluate

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

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