$3k^2+24k+48$
$6y\:+\:3\:-\:y\:+\:8$
$3y^2\cdot3y^2$
$\frac{\left(\sec x-1\right)}{\sec x+1}$
$\lim_{x\to\infty}\left(\frac{3x}{x-1}\right)$
$3x^2-3\left(x-1\right)>-\:\frac{2}{3}$
$\frac{9}{\cos\left(x\right)+1}+\frac{9}{cos\left(x\right)-1}=-18csc\left(x\right)cot\left(x\right)$
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