$\lim_{x\to0}\left(3\right)\sin\left(9\right)$

$\frac{4x^7-2x^6+3x}{x+2}$

$\int ln\left(x^2+\frac{7}{4}\right)dx$

$\lim_{x\to0}\left(x^{\tan\left(4\cdot x\right)}\right)$

$\frac{-2x+18}{x^3+6x^2+9x}$

$\frac{dy}{dx}-6y-30=0$

$4pq^3x\left(-p^2\right)+\frac{2}{3}p^2q^3x\left(p+2p\right)+2pq^3$