5.6abc+(2分之11abc)-10分之1abc
=5.6abc+5.5abc-0.1abc
=(5.6+5.5-0.1)abc
=11abc
(-5a的4次方)-a的4次方-(-7a的4次方)
=-5a的4次方-a的4次方+7a的4次方
=(-5-1+7)a的4次方
=a的4次方
5.6abc+(2分之11abc)-10分之1abc
=5.6abc+5.5abc-0.1abc
=(5.6+5.5-0.1)abc
=11abc
(-5a的4次方)-a的4次方-(-7a的4次方)
=-5a的4次方-a的4次方+7a的4次方
=(-5-1+7)a的4次方
=a的4次方