completeaza: a) (5³)⁰= b) (2³)⁵= c) (1³⁰)⁵⁰= d) (2⁵)³×(2³)⁵:(2³)¹⁰= e) (7³⁰)⁰×(49⁵)³:(7⁶)⁵= f) (3¹)⁵:(9³)²= g) (21³)⁵:(21²)7= h) (2³)⁵:(21²)7= h) (2³)⁵×(4³)⁵:(8³)⁴= dau coroană​