Question 322540
I'm not sure if that's a negative sign in front so here it is both ways:
a.
{{{-(4m-3)+(5m^2-4m+7)}}}
{{{(-4m+3)+(5m^2-4m+7)}}}
{{{(-4m-4m)+(5m^2)+(3+7)}}}  Combine like terms
{{{-8m+5m^2+10}}}  Rewrite
{{{5m^2-8m+10}}}

b.
{{{(4m-3)+(5m^2-4m+7)}}}
{{{(4m-4m)+(5m^2)+(-3+7)}}}  Combine like terms
{{{5m^2+4}}}