$\frac{dy}{dx}\left(\left(2x+3\right)\left(y-1\right)\right)$
$\frac{10x}{10x^2}$
$sin^2x-3cos^2x$
$x^2-10x+19=0$
$2x^2-13x-20=0$
$3\sec^2+10\tan=11$
$40\cdot14$
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