$j+j+k+j+j+i+h+i+h-k$
$\:x^{2\:}+22x+242$
$\lim_{x\to6}\left(\frac{x^2-3x-18}{x-6}\right)$
$3x-5>7x+12$
$\left(2xy^2-9xy^3\right)\left(2xy+3xy^3\right)$
$986+77$
$-45,8+0,05$
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