Explicación paso a paso : <img src="https://tex.z-dn.net/?f=%284%20-%208%29%20%5Cdiv%202%20-%20%289%20-%2012%29%20%5Cdiv%203%20%5C%5C%20%28%20-%204%29%20%5Cdiv%202%20-%20%28%20-%203%29%20%5Cdiv%203%20%5C%5C%20%20-%202%20-%20%28%20-%201%29%20%20%5C%5C%20-%202%20%2B%201%20%3D%20%20-%201" />( - 3).
[( + 7) + ( - 2)]( - 3).
[7 - 2]( - 3) * 5 = - 15(6 - 2 - 10) : (5 - 11)( - 6) : ( - 6) = 1( + 5).
[( - 3) + ( - 7)](5).
[ - 3 - 7](5) * [ - 10] = - 5027 + 3.
5 - 1627 + 15 - 16 = 2627 + 3 - 45 : 5 + 1630 - 9 + 16 = 37(2.
4 + 12)(6 - 4)(8 + 12) * (2)20 * 2 = 403.
9 + (6 + 5 - 3) - 12 : 427 + (11 - 3) - 327 + 8 - 3 = 322 + 5(2.
3)2 + 5 * 62 + 30 = 32440 - [30 + 6(19 - 12)]440 - [30 + 6(7)]440 - [30 + 42]440 - [72]440 - 72 = 3689 : ( - 3) + 8.
( - 5) + 36 - 3 + ( - 40) + 36 - 3 - 40 + 36 = - 7( - 12).
4 - ( - 32) : 8 - ( - 5) - 48 - ( - 4) + 5 - 48 + 4 + 5 = - 3965 : ( - 5).
2 + 28 : ( - 7) - 13 * 2 + ( - 4) - 26 - 4 = - 30( - 4) - 32 : ( - 8) + 2.
( - 6) - 4 - ( - 4) + ( - 12) - 4 + 4 - 12 = - 1215 - (.
40) : 10 + 15 : ( - 5).
215 - 4 + ( - 3) * 211 + ( - 6)11 - 6 = 563 : ( - 3) - 9 - ( - 7) + 1 - 21 - 9 + 7 + 1 = - 22( - 7).
(12 : ( - 2) + 3) - 10( - 7) * ( - 6 + 3) - 10( - 7) * ( - 3) - 1021 - 10 = 11(12 - 3.
5) + 10 : ( - 2)(12 - 15) + ( - 5) - 3 - 5 = - 818 : ( - 9) + ( - 3) - ( - 2) + 5 - 2 - 3 + 2 + 5 = 2 - 2 + ( - 3).
( - 4) - 2 + (12) - 2 + 12 = 10.