$\frac{d}{dx}\left(\frac{2.x.2^x}{\sqrt{x^2+1}}\right)$
$\log_b\left(mn\right)$
$\left(3x+4\right)\left(2x-8\right)$
$9a-3\left(a-5\right)$
$8m^2+36m^2+54m+27$
$\sin^4\left(x\right)+\cos^4\left(x\right)+2.\sin\left(x\right).\cos\left(x\right)$
$4x^3+2x-10$
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