bushyn

Array(4).fill()
.map(_ => _ => Promise.all(Array(2).fill().map(x => fetch('example.com').then(resp =>resp.json()))).then(arrJson=>console.log(arrJson)))
.reduce((prev, curr) => prev.then(curr), Promise.resolve())

bushyn

import math
F = lambda x: 1/((1+math.sin(2*x))**2)
def rectangle_method(a, b, E, c):
    n = 2
    JN1 = 0
    while 1:
        h = (b - a)/n
        x = a + c*h
        S = 0
        for i in range(n):