$\frac{3\left(x+m\right)^2-\cos\left(x+m\right)^2-3x^2-\cos\left(x^2\right)}{m}$

$\left(\frac{4xy}{y^6}\right)^3$

$\int\left(\left(sin\left(\frac{x}{3}\right)-6\right)cos\left(\frac{x}{3}\right)\right)dx$

$\left(2+4\cdot x^4\right)\cdot\left(2-4\cdot x^4\right)$

$\left(a^7\right)^3$

$\frac{2x+6}{2}-2x=6$

$\left(zx+my\right)^3$