$\lim_{x\to2}\frac{l\left(x-1\right)}{e^{x-2}-1}$

$5\left(4f^4-12x^3+9f^2\right)$

$9x^4-30x^3\:y+25\:x^2\:y^2$

$x-14=-43$

$\int\frac{\left(6-x\right)}{\sqrt{3x^2-12x}}dx$

$\log_x\left(52\right)-\log_x\left(13\right)=2$

$3x^2+3\left(-8x+16\right)-13\left(x-3\right)=3$