Q: Remove the spaces from the following sentence: The security of the exchange is overseen by the world leader for online payment, Verisign.
A: [Thesecurityoftheexchangeisoverseenbytheworldleaderforonlinepayment,Verisign.]

Q: Remove the spaces from the following sentence: Avoid summer if you can, as the buildings and streets turn into an oven, with the temperatures soaring to ridiculous heights.
A: [Avoidsummerifyoucan,asthebuildingsandstreetsturnintoanoven,withthetemperaturessoaringtoridiculousheights.]

Q: Remove the spaces from the following sentence: The production of the film has been laid in hands of professionals, which is clear to see. We do hope you´ll enjoy it.
A: [Theproductionofthefilmhasbeenlaidinhandsofprofessionals,whichiscleartosee.Wedohopeyou´llenjoyit.]

Q: Remove the spaces from the following sentence: He never submitted an entry for the prize but Hadamard, between the time his thesis was submitted and his oral examination, realised that his results could be applied to zeta functions.
A:
[HeneversubmittedanentryfortheprizebutHadamard,betweenthetimehisthesiswassubmittedandhisoralexamination,realisedthathisresultscouldbeappliedtozetafunctions.]