$k^2-8k=0$
$\lim_{x\to\infty}x^2\left(\frac{1}{e}\right)^x$
$-x^3+8x^2-19x+12$
$-4x^2+x-78=0$
$\frac{a^{2}b^{3}}{a^{-1}b^{2}c}$
$3\left(2x+5\right)+2x-3$
$158.900+129.200$
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