Упростите выражение:
1) (56 + a) + 14;
2) 342 + (b + 58);
3) 805 + x + 195;
4) m + 4563 + 1837.
(56 + a) + 14 = (56 + 14) + a = 70 + a
342 + (b + 58) = (342 + 58) + b = 400 + b
805 + x + 195 = (805 + 195) + x = 100 + x
m + 4563 + 1837 = m + (4563 + 1837) = m + 6400