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2012+2013x2012-2014x2011

Răspuns :

2012+2013x2012-2014x2011 =

= 2012×(1 + 2013) - 2014 × 2011 =

= 2012 × 2014 - 2014 × 2011 =

= 2014 × (2012 - 2011) =

= 2014 × 1 =

= 2014
2012+4050156-4050154=4052168-4050154=2014