$\frac{dy}{dx}\left(y^3-x^2=4\right)$
$( a + 2 ) ^ { 2 }$
$\lim_{x\to\infty}\left(\frac{\sqrt{81x^2+x-3}}{9x+1}\right)$
$\left(4z+2\sqrt{z}-2\right)\left(2\sqrt{z}+5\right)$
$\sqrt[3]{1000f}$
$sinx\left(secx+cotx\right)=cosx$
$\lim_{x\to1}\left(\frac{x^3-x^2+x-1}{x^2-1}\right)$
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