$\lim_{x\to\infty}\left(\sqrt{x^2-4x+5}-x\right)$
$40y-16y$
$\int21x\sqrt{x^2+9}dx$
$\lim_{x\to-3}\left(\frac{x+3}{2-\sqrt{x+7}}\right)$
$v+\left(-6z\right)+v+v$
$\frac{2a^3-a+3a^2-1}{a+3}$
$\int_0^1\left(\frac{3}{\left(\sqrt{1-x^2}\right)}\right)dx$
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