[Q]: [Anumberofquestionswillarisewhenallelementsarearrangedintoonewhole,butthemostinterestingproblemappearstometobethearrangementofgroupsofsimilarelements,suchasthoseofiron,cerium,palladiumandplatinumsince,inthiscase,elementsclosetoeachotherintheirnaturealsoexhibitapproximatelythesameatomicweights,acircumstancenottobeobservedinotherrows,forinthelattersimilarelementspossessdifferentatomicweights.]
[A]: [A number of questions will arise when all elements are arranged into one whole, but the most interesting problem appears to me to be the arrangement of groups of similar elements, such as those of iron, cerium, palladium and platinum since, in this case, elements close to each other in their nature also exhibit approximately the same atomic weights, a circumstance not to be observed in other rows, for in the latter similar elements possess different atomic weights.]
Problem: Add spaces: Chemotherapymayalsobeadvisedinthesepatients,thoughithasnotyetbeensatisfactorilyevaluatedforthistypeofcancer.

Spaces added: Chemotherapy may also be advised in these patients, though it has not yet been satisfactorily evaluated for this type of cancer.
This text is missing some spaces, please add them: UnsureaboutwhichtypeofATXfileyouhave?Doyouwanttoknowexactlywhatitis,whocreatedit,andhowtoopenit?
Unsure about which type of ATX file you have? Do you want to know exactly what it is, who created it, and how to open it?
input question: Fix spacing: Thisgamehasdifferentendings(6).

output answer: This game has different endings (6).
Problem: Launchmemorychiprecoverysoftware(forWindowsOS),byselectingitfromtheStartMenu.ThemainwindowpopsupasshowninFigure1.
What's a sentence that uses these characters?
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Launch memory chip recovery software (for Windows OS), by selecting it from the Start Menu. The main window pops up as shown in Figure 1.
Buthemustfirsttakesuitablemeasurestoevokeit.Theseincludecleansingofbodyandmind,aspirationoffeelingandthought,silencingofintellectandego.
But he must first take suitable measures to evoke it. These include cleansing of body and mind, aspiration of feeling and thought, silencing of intellect and ego.