$\left(\frac{5}{4\:\:}x^2-\frac{1}{6}y^2\right)\left(\frac{5}{4}x^2+\frac{1}{6}y^2\right)$

$\left(6m-7h\right)^3$

$3a+5\:para\:a=-2$

$\frac{3-x}{x}=\frac{x+1}{2}$

$e\:=\:\sqrt{2a+c^2-b}$

$\frac{x^2}{x^2+6}$

$\frac{dy}{dx}=\frac{\left(x+3y\right)}{-\left(x-y\right)}$