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2014-10-29T20:47:43+02:00
Axb=91
axc=28
ax(b+c)
ax(b+a)xc=b+c
axb+axc=ax(b+c)=91+28=1x(91+28)
a=1
b=91
c=28
(axb)+(axc)=b+c
91+28=91+28
119=119