QUESTION: Fix punctuation: Although he was greatly influenced by Klein and had already begun to undertake advanced work with him he went for academic year 187778 to continue his studies at the University of Berlin where he attended classes by Kummer  Weierstrass and Kronecker  In particular he attended the one semester course by Weierstrass Introduction to the theory of analytic functions and the notes taken by Hurwitz at this time are reproduced as the book 
ANS: Although he was greatly influenced by Klein and had already begun to undertake advanced work with him, he went for academic year 1877-78 to continue his studies at the University of Berlin where he attended classes by Kummer , Weierstrass and Kronecker . In particular he attended the one semester course by Weierstrass Introduction to the theory of analytic functions and the notes taken by Hurwitz at this time are reproduced as the book .

QUESTION: Fix punctuation: He was thus reduced to cultivating his intellectual interests and often took part in public life under a transparent pseudonym
ANS: He was thus reduced to cultivating his intellectual interests, and often took part in public life under a transparent pseudonym.

QUESTION: Fix punctuation: No need to panic you can recover files from formatted SD card with outstanding performance of this SD Card Recovery application
ANS: No need to panic, you can recover files from formatted SD card with outstanding performance of this SD Card Recovery application.

QUESTION: Fix punctuation: We will explore optical signal processing in photonic wires for orders of magnitude improvements in bandwidth and energy efficiency and conduct fundamental research on optical silicon chips and integration technologies addressing ultimatecapacity optical communications
ANS:
We will explore optical signal processing in photonic wires for orders of magnitude improvements in bandwidth and energy efficiency, and conduct fundamental research on optical silicon chips and integration technologies addressing ultimate-capacity optical communications.