$126:\left(-9\right)$
$\frac{-2x^3+x^2-\frac{1}{2}x+3}{\frac{1}{2}x-x^2}$
$x^2-8x=10$
$\lim_{x\to\infty}\left(\frac{logx^2}{logx+5}\right)$
$4n^4\:+14n\:4\:+1$
$b^2\cdot b$
$18y^{2}+15y-18$
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