$\int\frac{\tan^2x}{\sec x}dx$
$x^2+x+30=0$
$\left(-4-x\right)^3$
$6+\left(-1\right)^2\cdot\left(8+2\right)$
$\int5\:sen^5\:3y\:cos\:3y\:dy$
$\lim_{x\to a}\left(\frac{\sqrt[3]{x}-\sqrt[3]{a}}{x^2-a^2}\right)$
$\frac{5\left(x+1\right)}{4}+\frac{x+2}{3}<\frac{x}{2}$
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