Remove the spaces from the following sentence: In 1921, the year he became Professor at Gottingen, he reformulated the First Law of Thermodynamics. Beginning in 1926, Born collaborated with Pauli and Heisenberg , who was a student of Born's, on quantum mechanics (the term "quantum mechanics" is due to Born).
In1921,theyearhebecameProfessoratGottingen,hereformulatedtheFirstLawofThermodynamics.Beginningin1926,BorncollaboratedwithPauliandHeisenberg,whowasastudentofBorn's,onquantummechanics(theterm"quantummechanics"isduetoBorn).