Question 159881
{{{-m^2+14-(6m^2+13+m^2)}}} Start with the given expression



{{{-m^2+14-6m^2-13-m^2}}} Distribute



{{{-8m^2+1}}} Combine like terms.



So {{{-m^2+14-(6m^2+13+m^2)}}} simplifies to {{{-8m^2+1}}} 



In other words,  {{{-m^2+14-(6m^2+13+m^2)=-8m^2+1}}}