Question 471346
{{{(Q -R) + (S -T)=((7m + 3n)-(11 - 2m))+((n + 5)-(-m - 3n + 8))=(7m+3n-11+2m)+(n+5+m+3n-8)=(9m+3n-11)+(m+4n-3)=9m+3n-11+m+4n-3=10m+7n-14}}}