1) use four fours to create 65, and you can use any mathematical symbols, but you can only use four fours as your digits.
2) find four #'s, the sum of which is 45, so that if 2 is added to the first #, 2 is subtracted from the second #, the third is multiplied by 2 and the fourth # is divided by 2, then thr four #'s produced are all the same.