$\left(-x^3-5x^2-9x-10\right)$
$x^2+x+1<0$
$w^2-14wd+49d^2$
$\lim_{x\to\infty}\left(\sqrt{\frac{1}{x^{2}-4x+4}}\right)$
$\frac{x^7}{x}-\frac{y^7}{y}$
$\left(-x+5\right)\frac{dy}{dx}=y$
$\lim_{x\to\infty}\left(4e^{\frac{7}{x}}\right)$
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