$25p^2-30p+9$
$\frac{20}{\left(1-5\right)}-6\cdot\left(1-3\right)$
$\int\frac{1}{\left(1-2x^{-1}\right)\left(1-x^{-1}\right)^2}dx$
$3^2+\sqrt{100}\:\left(-3\right)^4+\sqrt{49}-\sqrt{1}$
$w2-13w+42$
$20\:x\:\left(+5\right)$
$\lim_{x\to\infty}\left(\frac{3x^2-3x+9}{x}\right)$
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