$\int\cos^25dx$
$3x+6x-6x=9$
$8+4+6+9+19+12+15-19$
$y'+2xy=2x$
$\sqrt{144z^2}$
$\frac{x^4-x^2-3x+2}{x-2}$
$\left(4a^0\right)^4$
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