Example

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

Question

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

Expand

$x^{2}-2xy-2xz+y^{2}+2yz+z^{2}$

Evaluate

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

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