# The Zero Constraint

Algebra Level 2

$\large \dfrac1{a^2 + b^2 - c^2} + \dfrac1{a^2 - b^2 + c^2} + \dfrac1{b^2-a^2+c^2}$

If $$a,b$$ and $$c$$ are non-zero such that $$a+b+c=0$$, find the value of the expression above.

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