$\left(3y^2+y-7\right)\sqrt{\left(\frac{16}{x^2}-1\right)}\frac{dy}{dx}=x^2y^2-x^2$
$-\frac{1}{9}\left(\frac{8}{9}\right)^kx^k+\frac{1}{6}\left(\frac{3}{2}\right)^kx^k$
$y ^ { 2 } - 30 y - 635$
$x^{-2}=25$
$\left(a^{a+1}-3x^{a-2}\right)^2$
$\sqrt[26]{\sqrt[4]{\left(-2\right)}}$
$\left(18x-48\right)\cdot\left(\frac{1}{4}x^2-\frac{5}{4}x+\frac{25}{16}\right)$
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