#!/usr/bin/python
# -*- coding: utf-8 -*-
"""Add angles expressed as ratios.

It’s common to express angles in terms of their tangents; as, a 6:1
angle, or a 1:10 slope, or a 3:4:5 triangle.  After a Twitter
discussion with @Blouchtika about Wildberger’s rational trigonometry
and a recently discovered Babylonian tablet of Pythagorean triples, I
realized that there’s a simple way to add angles expressed in this
form, and it produces a new Pythagorean triple, given any two
Pythagorean triples!  Also, given two rational slopes, the resulting
angle sum is also rational, expressed as a slope.

This code computes that angle sum exactly as a slope, using strictly
integer math.

"""
import sys

def main(argv):
    _, a, b, c, d = argv
    a, b, c, d = map(int, [a,b,c,d])
    print(angle_sum((a,b), (c,d)))

def angle_sum(x, y):
    (a, b), (c, d) = x, y
    return reduced(c*a - b*d, c*b + a*d)

def reduced(x, y):
    d = gcd(x, y)
    return x//d, y//d

gcd = lambda x, y: x if y==0 else gcd(y, x % y)

if __name__ == '__main__':
    main(sys.argv)