$\frac{3^{-2}}{3^2\cdot3^{-3}}$
$-\sqrt{-196}$
$x+3=10$
$3587-1824$
$2a^2+4ab^2-10a^3b^3$
$\frac{dy}{dx}=\frac{x}{-2y}$
$-4-3+5-2-7+3$
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