$\left(\frac{1}{2x}+\frac{3}{4y}\right)^2$

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

$\int\frac{x^2+x+1}{x^3+7x}dx$

$-xdy=\left(-4x+2y\right)dx$

$\lim_{h\to-3}\left(\left(h-2\right)\left(h-3\right)\right)$

$x^2+10x-1$

$\int_0^4\left(\frac{3x^2+x+16}{\left(x^2+16\right)\left(x+1\right)}\right)dx$