$\frac{9.8sinx}{cosx}=0$
$f\left(x\right)=3x^2-6x-24$
$\lim_{x\to1}\left(\frac{e^x-1}{\left(x-1\right)^2}\right)$
$\frac{2x^3-x^2+5x-1}{x^2+1}$
$7x^3-2x^3+4x+9\:$
$x^2-41x=-47$
$446\cdot765$
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