/**
 * Expands square of n into a sum of simpler multiplications
 * @param {string} equation - Mathematical expression to convert
 * @returns {string} Converted expression
 * @example mathConverter("1250*1250"); // "1500*1000+400*100+200*100+50*50"
 * @description
 * This function converts expressions like n^2 or n*n into a sum of simpler multiplications
 * using the distributive property. For example, 1250² is converted to
 * (1000 + 200 + 50)² = 1500*1000 + 400*100 + 200*100 + 50*50
 */
export declare const mathConverter: (equation: string) => string;