$4500\:\cdot\:10$
$y^4+16+2y^3+8y$
$-3-15>6$
$\frac{x^2-20\:+\:x}{x\:-\:5}$
$-\left(10k+6.2\right)$
$\int_{\sqrt{x^2-4x+3}}^{x-1}dx$
$\left(4b+5b\right)^3$
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