$4\sin\left(x\right)\cos^2\left(x\right)=\sin\left(2x\right)$
$a^{x+3}=a^{3x-5}$
$\:\frac{dy}{dx}+\frac{y}{x}=\left(x^3\right)\left(y^2\right)$
$\frac{d^2}{dx^2}\left(13x^2+y^2=3\right)$
$\frac{\left(x^{10}+x^7+x^6+x^5+x^3\right)}{x^3+1}$
$\left(-27+h\right)^2$
$\left(x^4-2\right)\left(x^2+2\right)$
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