$9^2x\:9^0$

$\left(6n-5\right)^2$

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

$\log\:\left(\frac{z^2}{y}\right)=\log\:\left(z^2\right)-\log\:\left(y\right)$

$\left(a^2-4a+4\right)\left(a^2-2a\right)$

$3x^2-8x+16$

$7\tan\:\left(x\right)\sin\:\left(x\right)=-6\sin\:\left(x\right)$