Add spaces: Thesupplementsareactuallymorethanpowerfulenoughtoworkwellontheirown,butmostpeopledopreferto"stack"themandusetheminacycleinordertogetfasterandevenmorepowerfulresults.

Answer: The supplements are actually more than powerful enough to work well on their own, but most people do prefer to "stack" them and use them in a cycle in order to get faster and even more powerful results.

Add spaces: Theotheraffixsignifiestheninthspeciesunderthedifferences,whichisEverness.TheLoopattheendofthisaffixdenotesthewordistobeusedadverbially;sothatthesenseofitmustbethesamewhichweexpressbythephrase,ForEverandEver.

Answer: The other affix signifies the ninth species under the differences, which is Everness. The Loop at the end of this affix denotes the word is to be used adverbially; so that the sense of it must be the same which we express by the phrase, For Ever and Ever.

Add spaces: AterracelandscapethatisknownfromKilen,yetwithspaceforfunctionsthecitizens,visitorsandstudentscanuseactivelyatalltimesoftheyear.

Answer:
A terrace landscape that is known from Kilen, yet with space for functions the citizens, visitors and students can use actively at all times of the year.