$\left(m+\frac{2}{5}\right)\left(m-\frac{1}{2}\right)$

$sin\left(\frac{\pi}{2}-x\right)\sec\left(x\right)=1$

$2cosx=\sqrt{3}$

$567\cdot573$

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

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

$3x\:-\:4\:-\:5x\:-\:8y$