Question: Walker returned to England and from 1865 he worked in London as a lecturer in applied mathematics and physics at University College
Please fix the punctuation.
Fixed: [Walker returned to England and, from 1865, he worked in London as a lecturer in applied mathematics and physics at University College.]

Question: You look around and you just cant ignore the lights the laughter the sound of coins hitting the metal when somebody wins or the sounds of the bells ringing
Please fix the punctuation.
Fixed: [You look around and you just can't ignore the lights, the laughter, the sound of coins hitting the metal when somebody wins, or the sounds of the bells ringing.]

Question: The presentation of new numerical methods brought fresh and exciting material as well as realistic new applications to the classroom
Please fix the punctuation.
Fixed: [The presentation of new numerical methods brought fresh and exciting material, as well as realistic new applications, to the classroom.]

Question: Back in 1876 a player named Wild Bill Hickock was shot after winning with it
Please fix the punctuation.
Fixed:
[Back in 1876, a player named Wild Bill Hickock was shot after winning with it!]