export type NumberContent = {
    type: "whole";
    value: number;
    sign: "+" | "-";
} | {
    type: "fraction";
    numerator: number;
    denominator: number;
    sign: "+" | "-";
} | {
    type: "mixed";
    whole: number;
    numerator: number;
    denominator: number;
    sign: "+" | "-";
};
/**
 * Convert a number content union into inner MathML (no outer <math> wrapper).
 * - Whole: optional minus sign + integer
 * - Fraction: optional minus sign + mfrac
 * - Mixed: optional minus sign + whole + thin space + mfrac
 */
export declare function numberContentToInnerMathML(value: NumberContent): string;
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