# TRVMathItemInfo.Text

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 Mathematical expression in LaTeX-like format. property Text: String; Differences from LaTeX: ▪the symbols "[]{}" after "\left" and "\right" must be prefixed with "\"  (i.e. "\left\[" instead of "\left[" in LaTeX);▪matrices are defined as "\matrix{ a_11 & a_12 \\ a_21 & a_22}"▪conditions are defined as "\case{ a_11 & a_12 \\ a_21 & a_22}"Unlike text items, this is not the text returned by TCustomRichView.GetItemText. Unicode note: since this item is available only for Unicode versions of Delphi, this is a Unicode text string. Use TRichViewEdit.SetCurrentItemExtraStrPropertyEx to change value of this property as an editing operation (RVMathItem.rvespcText). Examples of values and results: \forall x \in X, \quad \exists y \leq \epsilon k_{n+1} = n^2 + k_n^2 - k_{n-1} x = a_0 + \frac{1}{\displaystyle a_1 + \frac{1}{\displaystyle a_2 + \frac{1}{\displaystyle a_3 + \frac{1}{a_4} } } } If the expression is incorrect, the item is displayed in an erroneous state.