Răspuns:
a) 11/5+(4/10)⁽²=11/5+2/5=13/5
b) (12/9)⁽³+7/3=4/3+7/3=11/3
c) 7/4+(-18/8)⁽²=7/4-9/4= (-2/4)⁽²= -1/2
d) (-18/21)⁽³+(10/14)⁽²=(-6/7)+5/7= - 1/7
e) (-20/24)⁽⁴+ (-15/18)⁽³=(-5/6)+(-5/6)= -10/6
f)( -21/56)⁽⁷ +(-33/24)⁽³ = (-3/8)+(-11/8)= (-14/8)⁽²= -7/4
