$\left(2x^{7m}-x^m\right)^2$

$0mun$

$\frac{1}{2}\left(sin\left(x+y\right)+sin\left(x-y\right)\right)=sinxcosy$

$\left(x\:+\:8y\right)^2\:-\:\left(x\:-\:8y\right)^2$

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

$\frac{\cos\:\left(x\right)+\sin\:\left(x\right)+1}{\cos\:\left(x\right)+\sin\:\left(x\right)}$

$x^6-64x^6$