$\int\:\frac{x^3}{x^4-x^2+2}dx$
$\sqrt[4]{x^4+x^{-4}}$
$n3\:+512$
$x ^ { 2 } y ^ { \prime } = 9 x ^ { 2 } - 6$
$7=n-2$
$20,00-11,53$
$\frac{x}{7}=1$
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