Function frac

pub fn frac<N, D>(numerator: N, denominator: D) -> MathML
where
    N: Into<MathML>,
    D: Into<MathML>,

Build a normal fraction.

Input

\begin{vmatrix} a & b \\ c & d \end{vmatrix}

Output

$$({}_{}{}^{1}H_{}^{},{}_{}{}^{2}H_{}^{},{}_{}{}^{3}H_{}^{})$$