Question: Stieltjes became assistant at Leiden Observatory in April 1877 but his father who had done so much to help his son was not to live long after helping his son to obtain this position for he died in Rotterdam on 23 June 1878
Please fix the punctuation.
Fixed: [Stieltjes became assistant at Leiden Observatory in April 1877 but his father, who had done so much to help his son, was not to live long after helping his son to obtain this position for he died in Rotterdam on 23 June 1878.]

Question: All that pass by clap their hands at you They hiss and wag their head at the daughter of Jerusalem saying Is this the city that men called The perfection of beauty The joy of the whole earth
Please fix the punctuation.
Fixed: [All that pass by clap their hands at you; They hiss and wag their head at the daughter of Jerusalem, [saying], Is this the city that men called The perfection of beauty, The joy of the whole earth?]

Question: Glasgow established the Simson Chair of Mathematics to which Sneddon was appointed
Please fix the punctuation.
Fixed: [Glasgow established the Simson Chair of Mathematics to which Sneddon was appointed.]

Question: hidden voyeur couple Portuguese car
Please fix the punctuation.
Fixed:
[hidden, voyeur, couple, Portuguese, car]