The document contains a series of math problems involving operations with integers: 1) There are multiple multi-step arithmetic problems involving addition, subtraction, multiplication and division of integers. 2) There are additional multi-step problems involving operations inside parentheses before combining terms. 3) The problems get more complex incorporating nested parentheses and multiple operations within brackets.

1. NÚMEROS ENTEROS-REPASO Y REFUERZO
1 Resuelve operando paso a paso.
a) 6 –15 +13 –21 –9 =
b) 7 +12 –19 –6 +11 –9 =
c) (–5) –(+13) +(–16) –(–8) +(+7) =
d) (+14) +(–21) –(–18) –(+27) –(–11) =
e) (6 –9 +7 –11) –(8 –10 +13 –16) =
f) 4 · 8 –5 · 3 +6 · 4 –7 · 6 –3 · 6 =
g) 6 · (–4) –2 · (–8) +5 · 3 –9· (–2) =
2 Resuelve operando paso a paso
a) 3 · (2 –7) –5 · (3 –6) +2 · (8 –15) +4 · (11 –9) =
b) (4 –6) · (8 –3) –(5 –9) · (1 –7) +18 =
c) 3 · (5 –9 +2) –8 · (3 –6 –2) +4 · (5 –12) =
d) 20 –2 · [10 –3 · (6 –9)] =
e) 18 +3· (8 –12) –4 · [5 –3 · (6 +3 –5 · 2)] =
f) 21 –8 · (10 –4) +(8 –11) · [5 +(3 –6) · (8 –2)] =
g) 6 · [5 –2 · (8 –13)] –5 · [9 –3 · (6 –10)] =
h) (2 –5) · [4 –3 · (4 –9)] –(2 –7) · [15 –2 · (9 –4)] =