$\sin^{2}x-\sin^{4}x=\frac{\sin^{2}x}{\sec^{2}x}$
$\lim_{x\to-2}\left(x\right)$
$y'=\frac{\left(x^4\right)}{y^6}$
$256-121m^{16}$
$x^2-65x+18=0$
$y+3axy+3axy+2$
$-3x-7\le-2$
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