$\cos\left(x\right).\left(\sin\left(x\right)-1\right)=0$
$\frac{8a^9+125y^9}{2a^3+5y^3}$
$xy'=45y$
$-8-3+8\left(-3\right)$
$6m+6d+3d$
$\frac{\left(m^2+m+1\right)}{m^3-1}$
$\left(7a+b^5\right).\left(7a-b^5\right)$
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