$\lim_{x\to\infty}\left(\frac{\cos\left(3x\right)}{x^2}\right)$

$x^2-36\left(x+6\right)\left(x-6\right)$

$=2\left(\left(x+1\right)\sqrt{x+2}\right)$

$\frac{\left(x^4-15x^3+2x^2+12x-10\right)}{x^2-4}$

$\int_0^4e^xdx$

$\left(\frac{3}{2}m\right)\left(-4n\right)$