$$\lim_{x\to\infty}\left(\frac{12x^4-7x^2+6}{24x^3+17x-2}\right)$$

$$\int\left(2x+4\right)^4dx$$

$$\frac{x-3}{3}+\frac{2x-1}{6}$$

$$cscx-cscx\cdot sin^2x=cotx\cdot cosx$$

$$-6x^2+12x-20$$

$$5y-7+9x+2+\left(-2x\right)-5y$$