$2x+3xy+x^3$
$\sqrt{12}-\sqrt{27}+\sqrt{48}$
$\int_0^{\frac{\pi}{2}}\sec\left(x\right)\tan\left(x\right)dx$
$\frac{d}{dx}\left(ln\left(x+2\right)+\frac{1}{x}\right)$
$\frac{2}{3}+\frac{7}{3}$
$\int\left(2x^2+x\right)\cos\left(3x\right)dx$
$\left|1-x^2\right|\le\left(1+x\right)^2$
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