$\lim_{k\to9}\left(\frac{k^2-81}{\sqrt{k}-3}\right)$
$\int_0^12edx$
$y^2+10^2y+25$
$\left(y-3x\right)^6$
$\int_0^2\left(\sqrt[2]{9-r^2}\right)dr$
$3+5x+4$
$cos\left(2x+30\right)=0.5$
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