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export class Fraction {    sign: number;    molecular: number;    denominator: number;
    constructor({        sign = "+",        molecular = 1,        denominator = 1,    }: {        sign?: "+" | "-" | number;        molecular?: number | string;        denominator?: number | string;    } = {}) {        sign = sign || "+";        this.sign = (sign === "+" ? 1 : sign === "-" ? -1 : sign) *            Math.sign(Number(denominator)) *            Math.sign(Number(molecular));        this.molecular = Math.abs(Number(molecular));        this.denominator = Math.abs(Number(denominator));    }}export function FractionToString(f: Fraction) {    return `${f.sign < 0 ? "-" : ""}${f.molecular}/${f.denominator}`;}