what should shouldn't you do to keep fit?

đệ tử của ta có chs fi fai ko =)

ok đệ tử của ta ha ha ah ah ah ah 

b, 22 + 24 + 26 + 28 + 30 - 10 - 12 - 14 - 16 - 18 - 20
=46+26+28+30−10−12−14−16−18−20
=72+28+30−10−12−14−16−18−20
=100+30−10−12−14−16−18−20
=130−10−12−14−16−18−20
=120−12−14−16−18−20
=108−14−16−18−20
=94−16−18−20
=78−18−20
=60−20
=40

a, 55 + 56 + 57 + 58 - 35 - 36 - 37 - 38

=111+57+58−35−36−37−38  
=168+58−35−36−37−38
=226−35−36−37−38
=191−36−37−38
=155−37−38
=118−38
=80