Rust Taskbook Level 9.7

Задание 1

Given a word, mix the letters of this word in random order.

Задание 2

Ask the user for a number. Get all possible ways to factor this number into two factors.

Задание 3

Given a string containing two fractions and a mathematical operation between them:

rust'2/3 + 3/4'

Write code that will calculate the result of the written mathematical operation.