how to use math.js in a js file?

I want to use math.js in my code, but I can’t reference functions in math.js, I don’t want to use the pattern of npm install mathjs, only include math.js from local.

below is my code head, the lodash.js works correctly, but math.js can not find create and all functions.

import { create, all } from './math.js';

import { get, cloneDeep } from './lodash.js';

Thanks