Rat in a Cage

Congratulations, you saved the baby tapir! You woke up in your cell and you found that your captors left you the Chrome Book, the box and a rat in a cage! You examined the cage and found that the door was unlocked so you freed the rat and it scampered off into the jungle.

You also found this note: "You wanted to know who we are--well solve the final math problems below to get the password and open the box for the answer and a surprise!"

Problem 8: enter a number

Problem 9: only numbers, x & math symbols

Problem 10: enter a number (write mixed fraction with + sign, e.g. 2+3/7)

Problem 11: enter a number (try doing the easy way)

Problem 12: only numbers, x & math symbols

Problem 13: only numbers, b & math symbols

Problem 14: only numbers, c, d & math symbols

Who are these villians?