Type Alias TJIIXMathUnderoverscript

TJIIXMathUnderoverscript: TJIIXMathExpressionBase<Underoverscript> & {
    operands?: [
        TJIIXMathExpression,
        TJIIXMathExpression,
        TJIIXMathExpression,
    ];
}

Underoverscript expression (e.g., integrals with bounds)