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

$\lim_{x\to0}\left(x\right)\left(lnx^9\right)$

$\left(x^3-ab^2\right)^2$

$\left(x^m\right)^n=x^{mn}$

$\left(w+v\right)^3$

$x^3+y^3-6=0$

$2\sin^4x-\sin^2x=0$