Add spaces: ThistheoryallowedCavalieritofindsimplyandrapidlytheareaandvolumeofvariousgeometricfigures.

Answer: This theory allowed Cavalieri to find simply and rapidly the area and volume of various geometric figures.

Add spaces: ThankyouRobert,withoutyouandyourteam,many,manyliveswouldbefullofpain,hopelessnessandgladtoleavetheplanet.

Answer: Thank you Robert, without you and your team, many, many lives would be full of pain, hopelessness and glad to leave the planet.

Add spaces: TheyjustthoughthewastoughwhenhewentonabouthowtheywouldstopHitlerandtheNazisgainingground,fortheyallthoughttheycouldsolvetheprobleminadifferentway.

Answer:
They just thought he was tough when he went on about how they would stop Hitler and the Nazis gaining ground, for they all thought they could solve the problem in a different way.