$-4f^4+3f^3+f^2\left(\frac{\left(f+3\right)\left(f+2\right)}{f^2+5f+6}\right)$

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

$\int18e^{0.03x}dx$

$\int\left(\sqrt{cot\left(t\right)}csc^2\left(t\right)\right)dx$

$\left(x+1\right)e^x$

$\lim_{x\to0}\left(\frac{tan\left(8x\right)-8x}{x^3}\right)$

$\lim_{x\to10}\left(\frac{x+10}{x^2-100}\right)$