term of office

I finish my term.

私は任期を終えます

I finish my term without trouble.

私は任期を無事に終えます

I finish my three-year term without trouble.

私は三年の任期を無事に終えます

I finish my three-year term at the school without trouble.

私は学校で三年の任期を無事に終えます

I finish my three-year term at the school without trouble this December.

私は今年の十二月に学校で三年の任期を無事に終えます