Problem: Add spaces: Discover,amongothers,coversfordifferentConcept2rowingmachinemodels,aheartratereceiveroramemorycardforyourConcept2rowingmachine!

Spaces added: Discover, among others, covers for different Concept 2 rowing machine models, a heart rate receiver or a memory card for your Concept 2 rowing machine !
This text is missing some spaces, please add them: IfKempe'sworkonthefourcolourtheoremisnotmentionedinhisobituarythenitisreasonabletoask:whatwasconsideredhismostimportantcontributiontomathematicsin1923?TheansweristhatMacMahon,whocontributestothedescriptionofKempe'smathematicalachievements,consideredhisMemoironthetheoryofmathematicalformpublishedinthePhilosophicalTransactionsofTheRoyalSocietyin1886tobehismostimportantwork.
If Kempe's work on the four colour theorem is not mentioned in his obituary then it is reasonable to ask: what was considered his most important contribution to mathematics in 1923? The answer is that MacMahon , who contributes to the description of Kempe's mathematical achievements, considered his Memoir on the theory of mathematical form published in the Philosophical Transactions of The Royal Society in 1886 to be his most important work.
input question: Fix spacing: DidsomeoneemailyouaF7fileandyou'renotsurehowtoopenit?MaybeyouhavefoundaF7fileonyourcomputerandwonderingwhatit'sfor?Windowsmighttellyouthatyoucan'topenit,orintheworstcase,youmightencounteraF7filerelatederrormessage.

output answer: Did someone email you a F7 file and you're not sure how to open it? Maybe you have found a F7 file on your computer and wondering what it's for? Windows might tell you that you can't open it, or in the worst case, you might encounter a F7 file related error message.
Problem: Insurancecompaniesarealsointoinvestmentbusinesses.
What's a sentence that uses these characters?
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Insurance companies are also into investment businesses.
Add spaces: Hungarian,oldman,stockings08:00

Answer: Hungarian, old man, stockings 08:00
This text is missing some spaces, please add them: WithintheframeworkoftheARCH+features,theZurich-basedarchitectaffordedaninsightintohismodeofthinkingandhisdesignmethods.
Within the framework of the ARCH+ features, the Zurich-based architect afforded an insight into his mode of thinking and his design methods.