$3\left(a+b\right)^2c+3\left(a+b\right)c^2$
$10n^4-25n^3+15n^2-5n$
$17-8x>5-2x$
$x^2+2=-x+1$
$\left(-x^2+x\right)+\frac{ydx}{dy}=0$
$\lim_{x\to0}\left(\frac{\left(e^{7x}-1\right)}{\sin\left(x\right)}\right)$
$-135:-9$
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