1) 49² + 2*49*51 + 51² = (49 + 51)² = 100² = 10000
2) 58² - 2*33*58 + 33² = (58-33)² = 25² = 625
3) (19² + 2*19*11 + 11²)/((19-11)(19+11)) = (19+11)²/(8*30) = 30/8 = 15/2 = 7.5
4) (53² - 2*53*47 + 47²) / ((53-47)(53+47)) = (53-47)²/(100*6) = 6/100 = 0.06
5) (183 - 93)(183² + 183*93 + 93²)/(183² + 183*93 + 93²) = 183 - 93 = 90
6) (43,73² - 43,73*56,27 + 56,27²)/((43,73 + 56,27)(43,73² - 43,73*56,27 + 56,27²)) = 1/100 = 0.01