$\lim_{x\to5}\left(3x^4+4x+3\right)$
$\left(3m^6-5m^2\right)^2$
$8x-2y-8$
$\lim_{x\to4}\left(\frac{\sqrt{1+2x}-3}{\sqrt{x-2}}\right)$
$\frac{4a^4b-4ab^4}{5}$
$-\frac{4}{7}c+\left(-\frac{2}{7}c\right)+\frac{1}{7}$
$20y^2-10x$
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