$\frac{1}{16}a^2\:-\:\frac{1}{6}ab\:+\:\frac{1}{9}b^2$

$3x^2-9x-5y-2=0$

$\left(25n^2-16m^6\right)\cdot\left(25n^2+16m^6\right)$

$\sqrt{5x}$

$\left(x^{-2}y^{-3}\right)dx+\left(x^{-3}y^{-4}\right)dy$

$6\:\frac{3}{2}$

$\log\left(2+x\right)-\log\left(x-2\right)=\log\left(3\right)$