$\left(4^{2x}+\:3^{2y}\right)^2$

$\left(45+\sqrt{25}\right)\left(45-\sqrt{25}\right)$

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

$\sin\left(x\right)\cos\left(y\right)dx+\cos\left(x\right)\sin\left(y\right)dy=0$

$\left(3x+7\right)\left(x+3\right)$

$\left(x-1\right)\left(x+1\right)\le0$

$\frac{5x^2+32x+39}{x+5}$