Operaciones combinadas 7b

 $(–6+(–9))–(8+3)$  

 $45–(–32)+(–12)–|−7|$  

 $22–(–7+(–12)–19)+13$  

 $(–32+43–(–18))+(43–(–15))$  

 $(54–32+(–42))–(12–|−8|)$  

 $–77+(–56–65–54+(–8))$  

 $1–(98+(–67)–(–32)+(–12)–5)$  

[7 + (6 – 8)] – (–2)