$\left(3x+3\right)\left(3x+8\right)\left(5x-3\right)$

$\lim_{x\to\infty}\left(\frac{ln\left(tan\right)}{sec\left(x\right)}\right)$

$lim\:x\left(\arctan\left(e^x\right)-\frac{\pi}{2}\right)$

$\int_{-4}^{-3}\left(\frac{1}{\left(x+3\right)^3}\right)dx$

$\left(\frac{5}{7}a^2-\frac{5}{4}n\right)^2$

$t^2y'+ty=-8$

$y\frac{dy}{dx}\left(cos2x\right)$