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2012+2012•2013-2013•2014

Răspuns :

= 2012 + 2013 ( 2012 - 2014) = 
2012 + 2013 x(-2) = 
2012 - 4026 = 
- 2014 

2012 + 2012•2013 - 2013•2014 = 2012(1 + 2013) - 2013
•2014 =

2012
•2014 -2013•2014 = 2014(2012 - 2013) =2014•(-1) = -2014