Calcule as expressões:
a) (-1/2)² + 2/5
b) (2/5)² - (-1/2)³ =
c) 2 + (-1/3)² - (1/2) =
a) (-1/2)² + 2/5
b) (2/5)² - (-1/2)³ =
c) 2 + (-1/3)² - (1/2) =