input question: Fix spacing: Bonesandhorn-coresandtheirpowderandwaste,unworked,defatted,simplyprepared,treatedwithacidordegelatinised(excl.cuttoshape)

output answer: Bones and horn-cores and their powder and waste, unworked, defatted, simply prepared, treated with acid or degelatinised (excl. cut to shape)
Problem: YoumustshowavalidphotoIDatcheck-in.
What's a sentence that uses these characters?
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You must show a valid photo ID at check-in.
Add spaces: Youcanalwaysbargainonthemattherateyouwanttochargetothemiftheywantarticlesdonebyyou.

Answer: You can always bargain on them at the rate you want to charge to them if they want articles done by you.
Asthereis,inthegravitationalfield,anenergydensitythiscorrespondstoanequivalentmassdensityasgivenby(62).

As there is, in the gravitational field, an energy density this corresponds to an equivalent mass density as given by (62).
[Q]: [HolocaustmainlyaffectedAshkenaziJews.Bund,whichhadbeenthelargestJewishpartyinPolanduptoWorldWarII,wasalmosteradicatedbytheHolocaustalongwiththeYiddishlanguage.]
[A]: [Holocaust mainly affected Ashkenazi Jews. Bund, which had been the largest Jewish party in Poland up to World War II, was almost eradicated by the Holocaust along with the Yiddish language.]
Problem: Add spaces: TheStabilityPactforCentralandEasternEuropeissignedandadoptedinParis.

Spaces added:
The Stability Pact for Central and Eastern Europe is signed and adopted in Paris.