$x^2+6+81$
$88\cdot17$
$\lim_{x\to0}\left(\frac{e^{2t}-1}{t}\right)$
$3x^2+9x-30>0$
$25x^4-3^6$
$\left(a+b-c\right)\left(3x-3y+10\right)$
$\lim_{x\to0}\left(\frac{x}{x^2+x}\right)$
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