$28^2+45^2$

$\lim_{x\to8}\left(\frac{x-8}{\sqrt[3]{x}-2}\right)$

$\left(5x+p\right)\left(5x-p\right)$

$\int_{-\sqrt{3}}^{\sqrt{3}}\left(\frac{x^2}{x^2+1}\right)dx$

$2\left(4x-1\right)+x$

$2\left(-2^2+1\right)-3\left(-2^2-1\right)$

$\lim_{x\to\infty}\left(\sqrt{9x^2+x}-\left(3x+1\right)\right)$