$\left(2x\right)^7-1=2x-1$

$2\cos\left(180\right)+3\sin\left(90\right)-5\cos\left(0\right)-7\sin\left(270\right)$

$y3-125$

$\left(\frac{1}{4}x+\frac{2}{5}y\right)\left(\frac{1}{4}x-\frac{2}{5}y\right)$

$n^2-25$

$\sqrt{\left(h+1\right)^2-4}$

$\left(f^3+4v^z\right)^2$