$\frac{1}{\sec\:\left(x\right)+\tan\:\left(x\right)}+\frac{1}{\sec\left(x\right)-\tan\left(x\right)}=2\sec\left(x\right)$

$\sin\left(4x\right)\cos\left(6x\right)$

$75x^2+35x-10=0$

$\cos\left(162.37\right)$

$\left(4c^3d\right)^3$

$\int\frac{\left(5\right)}{\sqrt{16+25x^2}}dx$

$\lim_{x\to\infty}\left(\frac{lnx}{1+ln\left(x\right)^2}\right)$