Tính

a/250:{5.[(1997-1869)-78]}
b/100-[(64-48).5+88]:28
c/250:{5.[78-(1997-1969)]}
d/400:{5.[325-(290+15)]}
e/(173948-35):87+97.11
f/100:{2.[52-(35-8)]}
g/2448:[119-(23-6)]
h/27:{480:[(513:9+19)+84]}