Add punctuation: Opera 35 Final is available as a download on the official Opera website as well where new and existing users can download the release from
A: Opera 35 Final is available as a download on the official Opera website as well where new and existing users can download the release from.

Add punctuation: These values have remained largely unchanged since 2011 which indicates that this is not a new phenomenon
A: These values have remained largely unchanged since 2011, which indicates that this is not a new phenomenon.

Add punctuation: Europe is facing tremendous demographic changes within the coming decades
A:
"Europe is facing tremendous demographic changes within the coming decades.