input question: Fix spacing: Oncethatisoutoftheway,youaretakentothepresetselectionscreen.Dreamifyshipswith12presetsthatyoumaypreviewonthepage.

output answer: Once that is out of the way, you are taken to the preset selection screen. Dreamify ships with 12 presets that you may preview on the page.
Problem: Dilutehumanepithelialcolorectaladenocarcinoma(Caco-2)cellsincellmediumandplace200-400lofthecellsolutionintotheupper(apical)chamberofthetranswellinsert,atadensityof1.5x105cells/cm2.Fillthelower(basolateral)chamberwith700-900lofcellmedium.
What's a sentence that uses these characters?
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Dilute human epithelial colorectal adenocarcinoma (Caco-2) cells in cell medium and place 200-400 l of the cell solution into the upper (apical) chamber of the transwell insert, at a density of 1.5 x 105 cells/cm2. Fill the lower (basolateral) chamber with 700 - 900 l of cell medium.
Add spaces: Forseveralgoodreasons,nophotosareavailablehere,butseethereviewoveratGAFFA.dk.

Answer: For several good reasons, no photos are available here, but see the review over at GAFFA.dk.
YiSi,"TheWorld'sMostCatastrophicDamFailures:TheAugust1975CollapseoftheBanqiaoandShimantanDams,"inDaiQing,TheRiverDragonHasCome!,M.E.Sharpe,NewYork,1998.

Yi Si, "The World's Most Catastrophic Dam Failures: The August 1975 Collapse of the Banqiao and Shimantan Dams," in Dai Qing, The River Dragon Has Come!, M.E. Sharpe, New York, 1998.
[Q]: [1%ofacircleis]
[A]: [1% of a circle is]
Problem: Add spaces: Theye.g.increasemetabolism,inhibitappetite,stabilizethebloodsugar,orblocktheuptakeoffatbytheintestinalorthebody'scells.

Spaces added:
They e.g. increase metabolism, inhibit appetite, stabilize the blood sugar, or block the uptake of fat by the intestinal or the body's cells.