$\sec\left(x\right)\cdot\csc\left(x\right)=\tan\left(x\right)+\cos\left(x\right)$
$\left(x+1\right)\frac{dy}{dx}=x\left(x+1\right)$
$2x^2-7x+1$
$2x^2+4z^2$
$x+\sqrt{x+3}=2x+1$
$1+\cos\left(2x\right)+\cos^2\left(x\right)=3-3\sin^2\left(x\right)$
$logx=logx^2-12$
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