Răspuns:
a) (-5/6)⁸=5⁸/6⁸
b)-(4/5)¹³÷(4/5)²⁰÷(-4/5)=(4/5)¹³÷(4/5)²⁰÷4/5=(4/5)-⁸=(5/4)⁸
c)(-27/64)²=729/4096
d)[(1/49)²]⁴=(1/49)⁸
