The concept of zero! :D
Teddy Roosevelt was rather pissed at the American Indians. He created the Anti-Injun Act. This decreed that American Indians were no longer allowed to reside in the Americas. This was not very popular. The American Revolution was fought. American Indians got the right to vote and hold slaves.
They were allowed to start the colony because the Indians had made reservations.
Only if you have spouse.
There is no set limit on the number of negative words allowed in a clause. However, excessive use of negative words can make the sentence confusing or difficult to understand. It is generally recommended to limit the use of negative words for clarity and readability.
Observation
They allowed the humans to go ahahahahahhahahaha
It was written that Indians and dogs are not allowed in the train.
The laws allowed the Indians to be treated badly.
No solution. A negative number is not allowed.
I'm not allowed to tell u
No. As a mathematical process, division by zero is not allowed. (for more on why, see the related question and link)
yes -a=-b means you multiplied each side by -1 which is allowed