Add spaces: ItdevelopedrapidlyinthefollowingdecadeandwhenArtinsolvedthefollowingproblemin1924hewasfollowingthenaturalprogressionforthetopic.

Answer: It developed rapidly in the following decade and when Artin solved the following problem in 1924 he was following the natural progression for the topic.

Add spaces: Productsfor1x1watts1watt

Answer: Products for 1x1 watts 1 watt

Add spaces: Igaveupeventryingwithsupposedlysimplecropslikespinachorlettuce.

Answer:
I gave up even trying with supposedly simple crops like spinach or lettuce.