$\left(5y^n\right)\left(-5y^n\right)$

$14\cdot14\cdot4$

$\frac{\left(2x^2-11x+15\right)}{\left(2x-5\right)}$

$\left(4\right)^3+\left(4\right)^2+5\left(4\right)-9$

$\int\frac{10x+35}{\left(x+4\right)^2}dx$

$\int\frac{7x^4-3x^2+6}{x-7}dx$

$\left(-78\right)-\left(-56\right)$