Simplify $\frac{8x}{x-7}-\frac{3x+35}{x-7}$8xx−7−3x+35x−7.
Simplify $\frac{6u+1}{2u-3}-\frac{2u+7}{2u-3}$6u+12u−3−2u+72u−3.
Simplify $\frac{2y^2+6y+2}{7}-\frac{6y^2+5}{7}$2y2+6y+27−6y2+57.
Simplify $\frac{3m^2+5m+9}{m-8}-\frac{5m^2+4m+8}{m-8}$3m2+5m+9m−8−5m2+4m+8m−8.