Example

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

Question

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

Expand

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

Evaluate

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

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