$3\:\frac{3}{5}\cdot5$

$\frac{2tan^2x}{sec^2x}-1$

$-\left|-13+\left(24-68\right)\right|-\left(-48+95\right)$

$\left(4wx^2+5y^3z\right)\left(-20wx^2y^3z+16w^2x^4+25y^6z^2\right)$

$\sqrt[3]{5^{12}}$

$\lim_{x\to\infty}\left(1+\frac{2}{x}\right)^{\frac{x}{9}}$

$\frac{1}{sec\:x+1}-\frac{1}{sec\:x-1}=2\:cot^2\:x$