Answer
$7m^{3}$
Work Step by Step
We are given the polynomial $-m^{3}+2m^{3}+6m^{3}$.
We can use the distributive property to combine like terms.
$-m^{3}+2m^{3}+6m^{3}=(-1+2+6)m^{3}=7m^{3}$
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