$\frac{dy}{dx}+\frac{y-2}{4}=0$
$\left(3x-\frac{1}{3}\right)\left(3x+\frac{1}{3}\right)$
$\cot\left(x\right)\csc\left(x\right)=\csc\left(x\right)^2\cos\left(x\right)$
$m\left(x.y\right)=x\left(y+4\right)+y+4$
$87,6-79,2$
$\left(7^2\right)^{-3}$
$cos\left(x\right)+2\sin^2\left(x\right)=\sin^2\left(x\right)+1$
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