$sec\left(x\right)=1.236$
$\lim_{x\to0}\left(1-sqrt\left(x^2+x\right)\right)$
$\frac{3}{2a+8}+\frac{3}{a+3}+\frac{1}{2a+6}$
$\int7xe^{8x}dx$
$9x^2-x+225$
$2x-5>1+2x$
$\left(\frac{t-2}{2.5-2}\cdot\frac{t-4}{2.5-4}\right)$
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