$m^2+3m-15$

$y=\left(x+5\right)\left(x-5\right)$

$\lim_{x\to infinity}\left(\frac{x^3+x-\sqrt[3]{1+x^2}}{2x^2+5x}\right)$

$\frac{sec\:+1}{tan}=\frac{tan}{sec\:-1}$

$\frac{dy}{xdx}=\frac{\sin2x}{\sin2y}$

$\int\frac{e^{8x}}{\left(9e^{4x}-5\right)^{\frac{2}{5}}}dx$

$x^2dx+y^2dy=0$