$f\left(x\right)=x^3-6^2+9x-2$

$\left(-6\right)\left(-24\right)$

$\int_{\infty}^0\left(\frac{x}{x^2+1}\right)dx$

$\csc\theta-\sin\theta=\frac{\cot^2\theta}{\csc\theta}$

$\left(x+3n\right)\left(x-3n\right)\left(x^2-9n^2\right)+81n^4$

$\frac{x^3-7x+9}{x+3}$

$f^2+8f+11$