$$\int_0^{\pi}\sec\left(x\right)^4\tan\left(x\right)dx$$

$$\lim_{x\to0}\left(\frac{x^2}{\sqrt{16-x^2}-4}\right)$$

$$\frac{\csc^2\left(t\right)}{\sec\left(t\right)}=\csc\left(t\right)\tan\left(t\right)$$

$$\sqrt{48}\cdot\sqrt{3}$$

$$4m^2-16n^2$$

$$cot\left(a\right)+sec\left(a\right)\cdot sin\left(a\right)=1$$

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