$189+265$
$\left(\frac{1}{2}x^3-\frac{1}{4}x^2-5x+9\right)-\left(\frac{1}{5}x^3-\frac{8}{3}x^2\frac{5}{4}x\frac{1}{2}\right)$
$\tan\left(\arccos\left(5x\right)\right)$
$4r^6+12r^3s^2+9s^4$
$\lim_{x\to\infty}\left(\frac{x+1}{x^2+3}\right)$
$\int\frac{1}{x\sqrt{25x^2-2}}\:dx$
$13a\:-\:12b\:-\:15c\:+\:13b\:-\:16a\:+\:19c$
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