$\left(\frac{1}{4y^2}\:-\frac{1}{2}\right)\left(\frac{1}{4y^2\:}\:+\frac{1}{2}\right)$
$2,82\cdot745$
$4\left(3x\:+\:2\right)\:=\:ax\:+\:b\:$
$\frac{d}{dx}x^2e^{-y}+y^2e^{-x}=1$
$\frac{d}{dx}t\sqrt{10}$
$3x+4<13x+12$
$x+3^2$
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