Calculaţi:

a a= [a³ a³. (a¹) 20] : [(a²)*: (a)²]

b b=[(2³) 5+25³-735 : 720]: (215-715 +5°). 336

c c= [2 +2²-222 +2200 : 2120 +(35)10] : [1+224 +250 +22013 + 330] -2 + (57)³

DAU COROANA ​