Upgrade subject to access all content

Simplify completely. $ 1-\frac { 14 }{ 15 } { i }^{ { 15 } } $

$ \cfrac { 29 }{ 15 } $

$ \cfrac { 1 }{ 15 } $

$ 1-\cfrac { 14 }{ 15 } i $

$ 1+\cfrac { 14 }{ 15 } i $