a, (3567-214)-3567
=3567-214-3567
=-214
b,(-2017)-(28-2017)
=(-2017)-28+2017
=-28
c,-(269-357)+(269-357)
=-269+357+269-357
=0
d,
(123+345)+(456-123)-\(\left[2017-\left(-345\right)\right]\)
=123+345+456-123-2017-345
=456-2017=-1561
a.3567-214-3567
=3567-3567-214
=0-214
=-214
b.-2017-28+2017
=(-2017)+2017-28
=0-28
=-28
c.-269+357+269-357
=(-269+269)+(357-357)
=0+0
=0
d.(123+345)+(456-123)-[2017+345]
=123+345+456-123-2017-345
=(123-123)+(345-345)+(456-2017)
=0+0-1561
=-1561
a) \(\left(3567-214\right)-3567=3567-214-3567=-214\)
b) \(\left(-2017\right)-\left(28-2017\right)=-2017-28+2017=-28\)
c) \(-\left(269-357\right)+\left(269-357\right)=0\)
d) \(\left(123+345\right)+\left(456-123\right)-\left[2017-\left(-345\right)\right]\)
\(=123+345+456-123-\left(2017+345\right)\)
\(=123+345+456-123-2017-345\)
\(=-1561\)
a/=(3567-3567)-214
=-214
b/=-2017-28+2017
=0-28
=-28
c/=-269+357+269-353
=4
d/=123+345+456-123-2017-345
=-1561
