Can someone help i don’t understand this

Evaluate the given expression if m=45 |-3m|

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap