$-4\left(-4+5\right)-\left(8-9\right)+1+6$

$\int\frac{14}{x^2+13x+30}dx$

$2\left(2\right)+3\left(1\left(+2\right)+4\left(-2\right)\right)$

$\int x^2\left(x^2+4\right)^{\frac{3}{2}}dx$

$\frac{dy}{dx}-xy=xy^5$

$\lim_{x\to0}\left(\frac{e^x-e^{-x}-2x}{\sin\left(x\right)}\right)$

$x^5-x^4-34x$