$cos\left(x-70\right)=0,5$
$\lim_{x\to\infty}\left(\frac{x^2+4}{2}\right)$
$\lim_{x\to0}\left(5x+1\right)^x$
$\int\sqrt{7x-2}dx$
$\left(5\right)\cdot\left(-1\right)\cdot\left(0\right)$
$9z^2-42xz+49^2$
$4xb-6x^2a+6yb-9xya$
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