$469\:\:-68$
$-\left(-82-\left(42-35\right)+38\right)-56$
$12+9x-\left(19-6x\right)$
$\frac{cos2x}{cosx+sinx}=cosx-sinx\:$
$y^2=y$
$\left(8ab^2\right)\cdot\left(2a\right)$
$\frac{dy}{dx}-8xy-24x=0;\:y\left(2\right)=10$
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