$-\left(57-62\right)-\left(-70\right)-\left(-18\right)+11$
$4m-5m+4m$
$\cos\left(x+\pi\right)=\cos\left(x\right)$
$\frac{dy}{dx}=\sqrt{y^2-9}$
$5m^2n+15m^2$
$5x^4-3a^2+a^4+4a^4$
$\log\left(256\right)=8$
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