$4\frac{1}{2}+\sqrt{4^2+3^2}$
$13x=x\:^2+36$
$tg\:x\:+\left(1\:+\:cos\:x\right).\:cosec\:x=\:tg\:x\:+cotg\:x\:+cosec\:x$
$\int\left(x^2y^3z^4\right)dx$
$5.5-1.70$
$\frac{x^2+5x+6}{x^2-3}$
$\lim_{x\to1}\left(\frac{x^2-x}{\sqrt{2x+2}-2}\right)$
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