$\tan\left(3\right)=\frac{\sin3}{\cos3}$
$\int\frac{3x+9}{2x^3-x^2-5x-2}dx$
$\lim_{x\to\infty}\left(\frac{x^2+1}{x^3-x}\right)$
$8^2.4^3$
$2x^3-2x^2+x-10$
$32-19+43-18+35-53$
$\int4xe^{x^4}dx$
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