Question
Find the negation of 10 + 20 = 30
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$\cos ^{-1}\left(1-x^2\right)$
$xy =\log y + c _{;} \frac{d y}{d x}=\frac{y^2}{1-x y}$
$y = e ^{a x _x} ; x \frac{d y}{d x}= y \log y$