$5x^2+\:2x\:+3-2x^2-1$
$3x+9>54$
$6a^{x+3}+8a^{x+1}$
$10x^{2\:\:}-\:40x+40$
$\frac{dy}{dx}+xsenx=\frac{y}{x}$
$\left(x+z\right)^2$
$2\sin^2x-1=\sin\left(x\right)^4-\cos\left(x\right)^4$
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