$6x+6=5x+1$
$\int\cot^6xdx$
$9a^2x^2+3ax$
$9.67-8.93$
$x^2+4x-8y+4=0$
$\frac{40\pi}{5}\cdot2.5$
$\frac{d}{dx}\sqrt[8]{\frac{x^2+6}{x^2+7}}$
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