$99+-2$
$\frac{x^3-x^2-7x-3}{x-3}$
$\frac{4}{49x^2}-25=0$
$\csc^2x\left(1-\cos^2x\right)-1$
$9^{-1}\cdot9^2$
$x+3>4,1$
$\int\left(x+2\right)\cdot ln\left(x\right)dx$
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