$-\csc\left(x\right)^2=0$
$\frac{dy}{dx}=1+cos\left(y\right)$
$2y+17=2x+7$
$\left(7a^2+14a+1\right)^2$
$x^2+18x+2=0$
$4\cos\left(x\right)-1=0$
$-x<6$
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