Add punctuation: Shortly after this certainly by 1911 but some suggest in 1910 Littlewood began his famous collaboration with G H Hardy which we discuss in more detail below
A: Shortly after this, certainly by 1911 but some suggest in 1910, Littlewood began his famous collaboration with G H Hardy which we discuss in more detail below.

Add punctuation: Has a mild oestrogenlike effect and is used for regulating menstrual bleeding and for reducing menstrual pains
A: Has a mild oestrogen-like effect, and is used for regulating menstrual bleeding and for reducing menstrual pains.

Add punctuation: It was in his opinion the girls last terrible cry still echoing down the arches of the years
A:
It was, in his opinion, the girl's last terrible cry still echoing down the arches of the years.'