$3^{15}\cdot3^{12}$

$\int\left(-csc^2\left(5x-2\right)\right)dx$

$\lim_{x\to\pi}\left(\frac{x}{sen\:\left(x\right)}\right)$

$\left(\sqrt{x}+a\right)^2$

$\frac{dy}{dx}+y=xye^x$

$\int\sqrt{x^2-196}dx$

$\left(\frac{3}{4}x+\frac{9}{5}\right)\left(\frac{3}{4}x-\frac{9}{5}\right)$