$100x^2-80+16$
$\cos\left(\frac{3\pi}{2}+u\right)=\sin\left(u\right)$
$\frac{x^{\frac{25}{16}}}{x^4}$
$20-3,35$
$t+4+3-2t$
$\left(m^4-32\right)\left(m^4+4\right)$
$5xy-3x+4xy-8x+2xy$
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