$\lim_{x\to a}\left(2x^2-3x+4\right)$
$29-\left(-70\right)-\left(15\right)+65$
$\frac{x^{5}\left(x-5\right)^{6}}{\left(x^{2}+5\right)^{8}}$
$\left(\frac{x+100}{5}\right)=5$
$\left(7+byz^3\right)\left(-2ab^2z\right)^3$
$\left(-3\frac{3}{4}\right)+\left(-1\frac{3}{4}\right)$
$25k^2-70k+49$
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