$23^{18}\cdot\left(23^5\right)^4$

$\lim_{x\to0}\left(\frac{\sqrt{x}\left(sin\left(x-1\right)^2\right)}{\left(x+1\right)^3\left(lnx\right)^2}\right)$

$\log_a\left(\frac{2}{3}\right)$

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

$-3\left(5\:-\:15n\right)\:=\:15\left(3n\:-\:2\right)$

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

$\left(x^2-x-1\right)\left(2x\right)$