$63a^4b-37a^3b^2+27a^2b^3$
$\int\sqrt{64-t^2}dt$
$\lim_{x\to3}3x^3-8$
$\lim_{x\to4}\frac{x^4+256}{x-4}$
$a^2+6ab+9b^2-25$
$m^4.m^5.m+m^3.m^5.m^2$
$2.75-5.21\cdot0.4$
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