linguistic:paraphrasing, stylistic:style_transfer, structural:expansion, structural:summarization
ZD-GARCH

σ t 2 = α 1 ϵ t − 1 2 + β 1 σ t − 1 2. {\displaystyle ~\sigma _{t}^{2}=~\alpha _{1}~\epsilon _{t-1}^{2}+~\beta _{1}~\sigma _{t-1}^{2}.}