Tính

2.tính
a) 1/27 - 19 
b) ( -1/4 + 5/8 ) + -3/8
c)2/8 + 3/ -12
d)-5/17 : 2021/2022 + 2021/2022. -22/17 + 2021/ 2022
e) 8/7 + 4/7 . -6/17-4/11.5/11