$\frac{x^3}{x^3-27}$

$\sin\left(bx-c\right)+d$

$2\left(3y+7\right)\left(3y-4\right)$

$\int_2^{\infty}\left(\frac{1}{2}\right)dx$

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

$\lim_{x\to\infty}\left(\frac{1}{x+1}-\frac{1}{x}\right)$

$16m^4+8m^2+1$