$\int\:\left(7xe^{2x}\right)dx$
$x^{15}+y^{15}=x^{8}+1$
$-4\left(-5+3+9\right)+2\left(-9-2+15\right)$
$\left(\frac{1}{2}x+\frac{1}{4}\right)\left(\frac{1}{2}x-\frac{1}{4}\right)$
$-2z-4\ge-8$
$\frac{x^4+x^2-3x-26}{x+2}$
$-124+-359$
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