$\lim_{x\to0}\left(\frac{\sqrt{x^2+4}-2}{x}\right)$
$99,9999999999999+100$
$0.6+5+3.078+6.832$
$-\:45,6\:+\:456,\:85\:=\:$
$\left(4x^2+2\right)\left(3x^3-1\right)$
$\int\cos\left(3x\right)^7dx$
$\left(-40\right):10-\left(-5\right)\cdot9-25$
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