$2\sin\left(\frac{\pi}{2}x\right)=-1$
$5.7\cdot103$
$9x^2-12x$
$\frac{3a^{7}}{a^{7}}$
$2x^2-3x+12=0$
$-5x\:2x^3$
$\frac{d}{dx}\left(5e^{\frac{x}{10}}\right)$
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