QUESTION: Fix punctuation: Af Peter KurrildKlitgaard den 12 September 2007 5 svar
ANS: Af Peter Kurrild-Klitgaard, den 12. September 2007. 5 svar

QUESTION: Fix punctuation: pliers burnished handles with multicomponent grips also suitable for cutting fibre optics special tool steel burnished
ANS: pliers burnished, handles with multi-component grips, also suitable for cutting fibre optics, special tool steel, burnished

QUESTION: Fix punctuation: And in order to thank all the uses support and also as a return DLL Suite introduced this Free Download Service to help millions of PC users suffering from DLL errors like IMJPDSVREXE
ANS: And in order to thank all the uses' support and also as a return, DLL Suite introduced this Free Download Service to help millions of PC users suffering from DLL errors like IMJPDSVR.EXE.

QUESTION: Fix punctuation: On the other hand for a maximum df has to be negative and that requires that fxxx0 be negative
ANS:
On the other hand for a maximum df has to be negative and that requires that fxx(x0) be negative.