$n\left(n-4\right)$
$-10\cdot6.975$
$\frac{d}{dx}\left(sin\left(7x+9y\right)=7x+7y\right)$
$5.8-6.3-7.956+6.5$
$\frac{\text{sen}\theta}{\csc\theta}+\frac{\cos\theta}{\sec\theta}=1$
$36-24x+4x$
$3x+1<4$
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