$2\:ln\:\left(x\right)-3\:ln\:\left(x^2-4\right)-5\:ln\:\left(x+4\right)$

$3\sin\left(x\right)-\cos\left(2x\right)+2$

$\left(-y^7+3\right)^4$

$\sqrt{4x^2y}$

$\tan\left(x+45\right)=\left(\frac{1+\tan\left(x\right)}{1-\tan\left(x\right)}\right)$

$7\left(f+7\right)$

$a^2-11a+107$