Question

expressoes
a) -10-(-7+4-6)
b) -14-(7-6)+(8-5)
c) 10-{-2+[1+(+4)-8]}
d) 25+[-4+1-(-3+7)]
e) 21-[-17+(19-4)+12]
f) 39+[-10-(+32-10-8)+9]
g) 6-{-9+[-1+14-(8+17-12)]}

Answer 1

- 10 - ( -7 + 4 - 6 ) =
-10 - ( - 13 + 4 ) =
- 10 - ( - 9) =
- 10 + 9 = -1
==================================
- 14 - ( 7 - 6 ) + ( 8 - 5 ) =
- 14 - ( 1) + ( 3 ) =
- 14 - 1 + 3 =
- 15 + 3 = - 12 
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10 - { - 2 + [ 1 + ( + 4 ) ] } =
10 - { - 2 + [ 1 + 4 ] } =
10 - { - 2 + 5 } =
10 - { 3 } =
10 - 3 = 7
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25 + [ - 4 + 1 - ( - 3 + 7 ) ] =
25 + [ - 4 + 1 - ( 4 ) ] =
25 + [ - 4 + 1' - 4 } =
25 + [ - 8 + 1 ] =
25 + [ - 7 ] =
25 - 7 = 18
=======================================
21 - [ - 17 + ( 19 - 4 ) + 12 ] =
21 - [ - 17 + ( 15 ) + 12 ] =
21 - [ - 17 + 15 + 12 ] =
21 - [ - 17 + 27 ] =
21 - 0 = 21
=================================
39 + [ - 10 - ( + 32 - 10 - 8 ) + 9 ] =
39 + [ - 10 - ( + 32 - 18 ) + 9 ] =
39 + [ - 10 - 14 + 9 ] =
39 + [ - 24 + 9 ] =
39 + [ - 15 ] =
39 - 15 = 24
=====================================
6 - { - 9 + [ - 1 + 14 - ( 8 + 17 - 12 ) ] } =
6 - { - 9 + [ - 1 + 14 - ( 25 - 12) ] } =
6 - { - 9 + [ - 1 + 14 - 13 ] } =
6 - { - 9 + [ 14 - 14 ] } =
6 - { - 9 + 0 } =
6 - { - 9 } =
6 + 9 = 15