$4ln\left(x\right)-ln\left(x^2\right)=2$

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

$x+7>3$

$\frac{9x^4}{16}+\frac{1}{2}+\frac{x^{-4}}{9}$

$\csc\left(\frac{2}{x-2}\right)-\frac{\left(x+6\right)\sqrt{4x-x^{2}}}{2}$

$\cot\:^2\left(x\right)\left(1-cos2x\right)+2sen^2x=2$

$\sin\left(\frac{3\pi}{5}\right)\cos\left(\frac{\pi}{15}\right)+\cos\left(\frac{3\pi}{5}\right)\sin\left(\frac{\pi}{15}\right)$