input question: Fix spacing: However,hedidseethepossibilityofunificationinfivedimensions,whichseemstohavebeenpresentinhisinitialattempt.

output answer: However, he did see the possibility of unification in five dimensions, which seems to have been present in his initial attempt.
Problem: HissecondParis-Dakarrallywastheonlywomanintherace.
What's a sentence that uses these characters?
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His second Paris-Dakar rally was the only woman in the race.
Add spaces: Powersupply:48VDC(notincludedinsupplypackage)

Answer: Power supply: 48VDC (not included in supply package)
Theafternoonwillbringpartlysunnyweather.Morningtemperatureswillbearound14C.Duringthedaytheywillreachamaximumof22C.Lowtemperaturesatnightwillbearound12C.Intheafternoonwesterlywindsincreaseandarebrisk.

The afternoon will bring partly sunny weather. Morning temperatures will be around 14 C. During the day they will reach a maximum of 22 C. Low temperatures at night will be around 12C. In the afternoon westerly winds increase and are brisk.
[Q]: [WhenchattingdirectlyinGmailorGoogleTalk,youcango"offtherecord",sothatnothingtypedfromthatpointongetssavedinanyone'sGmailaccount.Goingofftherecordappliestoindividualpeopleandispersistentacrosschats.]
[A]: [When chatting directly in Gmail or Google Talk, you can go "off the record", so that nothing typed from that point on gets saved in anyone's Gmail account. Going off the record applies to individual people and is persistent across chats.]
Problem: Add spaces: 4yearsago2:22:29xHamsterclassic,Italian,vintage

Spaces added:
4 years ago 2:22:29 xHamster classic, Italian, vintage