import type { MathFormat } from "@khanacademy/perseus-core";
declare const KhanMath: {
    readonly cleanMath: (expr: string) => string;
    readonly bound: (num: number) => number;
    readonly factorial: (x: number) => number;
    readonly getGCD: (a: number, b: number) => number;
    readonly getLCM: (a: number, b: number) => number;
    readonly primes: readonly [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97];
    readonly isPrime: (n: number) => boolean;
    readonly getPrimeFactorization: (number: number) => ReadonlyArray<number>;
    readonly roundToNearest: (increment: number, num: number) => number;
    readonly roundTo: (precision: number, num: number) => number;
    /**
     * Return a string of num rounded to a fixed precision decimal places,
     * with an approx symbol if num had to be rounded, and trailing 0s
     */
    readonly toFixedApprox: (num: number, precision: number) => string;
    /**
     * Return a string of num rounded to precision decimal places, with an
     * approx symbol if num had to be rounded, but no trailing 0s if it was
     * not rounded.
     */
    readonly roundToApprox: (num: number, precision: number) => string;
    readonly toFraction: (decimal: number, tolerance?: number) => [number, number];
    readonly getNumericFormat: (text: string) => MathFormat | null;
    readonly toNumericString: (number: number | null, format?: MathFormat) => string;
};
export declare function sum(array: number[]): number;
export default KhanMath;