1. After the Muslim invasions of the seventh century the original Christians have nearly disappeared from actual Azerbaijan .
2. After the Muslim invasions of the seventh century , the original Christians from Azerbaijan have almost disappeared .

yes

1. The shells are formed of aragonite , although the cameral deposits may consist of primary calcite .
2. The shells are made of aragonite , although the primary deposits may consist of cameral calcite .

no

1. From 1871 to 1876 he served as federal collector of internal revenue for the district that included Hamilton .
2. From 1871 to 1876 , he served as an internal collector of federal revenue for the district that included Hamilton .
no