introducem intregii in fractie
4 intreg 7/12= (12*4+7)/12= 55/12
1 intreg 3/11= (11*1+3)/11=14/11
1 intreg 1/15= (15*1+1)/15=16/15
1 intreg 11/64= (64*1+11)/64=75/64
55/12 *14/11 +16/15 *75/64= 35/6 + 5/4=
aducem la acelasi numitor, numitorul comun este 12
inmultim prima fractie cu 2 si a doua cu 3
=70/12 +15/12=85/12
