a) { 26 + 12 – [ 4 + ( 6 – 5 )] + 15 } – ( 12 + 34 ) =

b) 15 – ( 13 – 8 ) + {16 + [ 15 + 9 – 2 . ( 1 + 3 ) ]} – ( 45 – 16 ) =

c) { 14 + [ 19 – 3 . ( 9 – 5 )] – [ 2. ( 4 – 1 ) + ( 7 – 4 )]} + 4 =

d) {[( 7 + 15 ) – ( 19 – 14 )] + [ 16 + ( 15 – 8 )]} – 28 =

e) { 16 + [ 9 – 5 . ( 3 – 2 )]} – { 18 – [ 12 – 3 . ( 2 + 1)]} =

f) 32 + 16 – { 45 – [ 12 + 3 . ( 5 – 2 )]} – { 14 + [ 5 – 3 . ( 5 – 4 )]} =

g) [ 15 + 16 – 2 . ( 16 – 12 ) + 19 ] – [ 57 – 2 . ( 4 + 2 + 6 )] =

h) { 15 + [ 16 – ( 5 . 5 – 19 ) + 2 . 2 ] – 18 } – [ 45 – ( 57 – 14 )] =


i) 21 + 39 – [ 14 + ( 16 – 12 )] – { 21 + [ 15 – 2 . ( 6 – 4 )]} + 30 =

j) { 63 – [ 24 + ( 6 . 3 – 13 ) – 4 ] + 3 } + [ 47 – ( 54 – 11 )] =
ayudaa