Hisbestmathematicalworkwasdonebeforehiswarserviceandwehavereferredtosomeofitabove.

His best mathematical work was done before his war service and we have referred to some of it above.
[Q]: [TheclosestairportforChamrousseis:]
[A]: [The closest airport for Chamrousse is:]
Problem: Add spaces: A.TheJetTecrefillkitsarecapableoffillingover750differenttypesofinkjetcartridge.

Spaces added: A. The Jet Tec refill kits are capable of filling over 750 different types of inkjet cartridge.
This text is missing some spaces, please add them: Productsforhighpowerledwallwasherip65ledwallwasherlight,lww2
Products for high power led wall washer ip65 led wall washer light,lww2
input question: Fix spacing: thefallingrightwards(fatteningatthebottom)(in).

output answer: the falling rightwards (fattening at the bottom) (in).
input question: Fix spacing: WindowsPCspurchasedbyinstitutionsforuseinK-12was60.8percentinQ42017,downfrom66.3percent,Futuresourcefound.Android-baseddeviceswereat20.7percentshare,upfrom14.6inthepreviousquarter.

output answer:
Windows PCs purchased by institutions for use in K-12 was 60.8 percent in Q4 2017, down from 66.3 percent, Futuresource found. Android-based devices were at 20.7 percent share, up from 14.6 in the previous quarter.