Example

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

Question

$$\frac{ { a }^{ 3 } + { b }^{ 3 } + { c }^{ 3 } -3abc }{ a+b+c }$$

Evaluate

$a^{2}-ab-ac+b^{2}-bc+c^{2}$

Expand

$a^{2}-ab-ac+b^{2}-bc+c^{2}$

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