$\log\left(x\right)+\log\left(y\right)=0$

$3m^4-6m^3+3m^2$

$\sin\left(x\right)+\left(\frac{4}{3}\right)\cos^2\left(x\right)=\frac{3}{2}$

$9x^{6}-12x^{3}+4$

$7ab\cdot3a^4b^4$

$\sec\left(y\right)-\frac{cos\:\left(y\right)}{1+sen\left(y\right)}=tan\left(y\right)$

$\frac{9}{4x^2}+2xy+\frac{4}{9y^2}$