a) ( 100 - 75 ) - [ ( 20 + 915 - 70 ) - ( 88 - 18 + 40 ) ]
= 25 - ( 865 - 110 )
= 25 - 755 = - 730 ( nu am stiut unde incepe paranteza rotunda dupa cea patrata )
b) = 100 - [ 30 + (34 - 20 )+ 60 ]
= 100 - ( 30 + 14 + 60 )
= 100 - 104
= - 4
c) = 22 - [ 22 - ( 22 - 18 + 58 - 40 ) ]
= 22 - ( 22 - 22 )
= 22
d) = 400 - [ ( 23 - 23 ) - ( 59 - 159 ) + 10 ]
= 400 - ( 0 + 100 + 10 )
= 400 - 110
= 290
e) = [ 1200 - ( 800 - 700 - 600 )] - 400
= [ 1200 - ( -500 ) ] - 400
= ( 1200 + 500 ) - 400
= 1700 - 400
= 1300