$$-2x+10=x-989$$

$$5-\left(\left(\left(2+33\right)\right)\right)$$

$$\int\frac{x+45}{x^2-25}dx$$

$$x^2+11x\:+33=0$$

$$126x+50$$

$$\lim_{x\to0}\left(\frac{\tan\left(2ax\right)}{\tan\left(bx\right)}\right)$$

$$\frac{dy}{dx}=\frac{y\left(1+x^2\right)}{2x^3}$$