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Testing MathJax
When \(a \ne 0\), there are two solutions to \(ax^2 + bx + c = 0\)
and they are
\[ x = {-b \pm \sqrt{b^2-4ac} \over 2a}.\]
Some other \( \TeX \) mathematics:
\[ A \Longrightarrow B \]
\[ \Gamma = \sum_{i=1}^n \lambda_i \]
\[ \frac{\partial^2}{\partial t^2} \mathbf{E} - \nabla^2 \mathbf{B} = 4\pi\rho .\]
\[ F = q (E + v \wedge B) \]
\[ a b = a \cdot b + a \wedge b \]
\[ \forall x \in X, \quad \exists y \leq \epsilon \]