$z^2+5z-24$
$\lim_{x\to\infty}\:4xe^{\frac{9}{x}}-4x$
$\sqrt{7^2-36}$
$y=\frac{1}{2}\sec\left(\frac{x}{2}\right)$
$\frac{1}{\sec\left(a\right)-\tan\left(a\right)}$
$\left(3a^2b^5c+5x^3y^5z^7\right)^3$
$\tan\left(\cos^{-1}\left(\frac{x}{3}\right)\right)$
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