Problem: Add spaces: Hi,mynameisKateandIam21years.

Spaces added: Hi, my name is Kate and I am 21 years.

Problem: Add spaces: ItwasthissurprisewhichledDuhemtolookforotherscientistswhoworkedbeforethedevelopmentofRenaissancemechanics.

Spaces added: It was this surprise which led Duhem to look for other scientists who worked before the development of Renaissance mechanics.

Problem: Add spaces: ButInowfeelobligedtocontinueprayingit,anditgetseasiereachtime.

Spaces added: But I now feel obliged to continue praying it, and it gets easier each time.

Problem: Add spaces: Isitpossibletoconvertabicyclistmotorist?

Spaces added:
Is it possible to convert a bicyclist motorist?