$\left(1-\frac{1}{\sec\left(x\right)}\right)\left(1+\sec\left(x\right)\right)=0$
$4x+4x+4x+4x+5$
$k^2-16k+64$
$\lim_{x\to\infty}\left(\frac{2}{3\left(x+2\right)}\right)$
$4w\:+\:3\:+\:2w\:-\:1$
$2tanx+\sqrt{3}=2\sqrt{3}-tanx$
$\left(-31\right).4$
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