$7y-8y$

$\frac{x^3+9x^2+25x+21}{x+3}$

$\lim_{x\to1}\left(x^{\frac{1}{x^2-1}}\right)$

$\int\left(\sin\left(\sqrt{x}\right)\right)\frac{1}{\sqrt{x}}dx$

$\left(x+5\right)\left(x-3\right)+\left(3x+1\right)\left(3x+4\right)+11-10x^2$

$\left(n+q\right)\left(n-q\right)$

$4p^4+32-24p^2$