$\lim_{x\to0}\left(\frac{e^2^x-1}{1-e^1}\right)$

$\left(\frac{3}{4}b^2c+2y\right)\left(\frac{9}{16}b^4c^2-\frac{3}{2}b^2cy+4y^2\right)$

$4b\:+\:5b^2$

$1-16a^4b^6c^2$

$\int\left(\frac{9x^2-8x+1}{\left(6x^3-8x^2+2x-1\right)}\right)dx$

$2+3n+2+9n$

$\frac{dx}{dy}=x^2+2x+2$