$2\cdot3^2+2\cdot5-12$

$\lim_{x\to-\frac{3}{2}}\left(\frac{4x^2-9}{8x^2+27}\right)$

$\frac{dy}{dx}-4y=0.8$

$\lim_{x\to0}\left(\frac{5\cdot\sin\left(x\right)^2}{x^2}\right)$

$cosx\left(1+secx\right)\left(cosx-1\right)$

$2\left(3xy\right)^3$

$f\left(x\right)=\left(4x^3-1\right)\left(2-\sqrt{x}\right)$