$-4x^2+4x+7$
$-2b+4b-5b+12b-13b$
$30x^4+36x^2+6$
$\sqrt[3]{\left(x^4y^0z^3\right)}^2$
$2,014\:+\:5,201\:+\:6\:+\:0,12$
$\frac{m-y}{\sqrt{m}+\sqrt{y}}$
$\lim_{b\to-2}\:3b-4$
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