$$\int\frac{\cos\left(x\right)}{\tan\left(x\right)}dx$$

$$\sqrt[2]{x^2+16}=5$$

$$\lim_{x\to\infty}\left(\frac{11x}{11x+6}\right)^{4x}$$

$$\frac{dy}{dx}\left(x^2y+\ln\left(xy\right)=1\right)$$

$$2\:x\:-10-1+-2$$

$$z^6y^8-1$$

$$csc\left(o\right)+sec\left(o\right)$$