Hello

Something in the middle ok?

$$ \mathcal{L}_{\text{NCE}} = - \frac{1}{N} \sum_{i = 1}^N \left[ \log \sigma (\ell_\theta (\mathbf{x}_i)) + \log(1 - \sigma(\ell (\tilde{\mathbf{x}_i}))) \right] $$$$ a = -b $$$$\underbrace{a}_{b} - \underbrace{c}_{d}$$

This is inline math: $E = mc^2$.