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this is a mathematical formula testing mathjax
−b±√b2−4ac2a
this is a mathematical formula testing mathjax
−b±√b2−4ac2a\frac{-b\pm\sqrt{b^2-4ac}}{2a}
this is a mathematical formula testing mathjax
−b±√b2−4ac2a
this is a mathematical formula testing mathjax
−b±√b2−4ac2a\frac{-b\pm\sqrt{b^2-4ac}}{2a}