Add punctuation: Trapflatclosurejs errors can be related to corrupt or outdated device drivers
A: Trapflatclosure.js errors can be related to corrupt or outdated device drivers.

Add punctuation: To address these barriers the expert group indicated four basic principles that should be at the heart of the future public sector
A: To address these barriers the expert group indicated four basic principles that should be at the heart of the future public sector:

Add punctuation: The portrait is also of art historical interest because it depicts the private sphere and is a representation of mother and child strolling spontaneously
A:
The portrait is also of art historical interest because it depicts the private sphere and is a representation of mother and child strolling "spontaneously".