QUESTION: Fix punctuation: Please state the number of children staying and their ages
ANS: Please state the number of children staying and their ages.
QUES: The main aim of this working group is twofold on one side it is to develop innovative methodologies for online teaching and learning Learning with fun and Visual search Engine on the other it is to monitor the communication flows among the participants to the online teaching and to assess their effectiveness

correct the punctuation.

CORRECTED: The main aim of this working group is twofold, on one side it is to develop innovative methodologies for online teaching and learning (Learning with fun and Visual search Engine) on the other it is to monitor the communication flows among the participants to the online teaching and to assess their effectiveness.
Question: The wound was very slight so that the fawn felt nothing of it the next morning
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Answer: The wound was very slight, so that the fawn felt nothing of it the next morning.
Samples purchased by or delivered to Varefakta are not returned after completed testing unless agreed in advance

Can you repeat this sentence, but add in punctuation?
Samples purchased by or delivered to Varefakta are not returned after completed testing, unless agreed in advance.
input: Even though daily life and lifes circumstances can vary greatly from person to person everyone has the same possibilities to come to a personal life with Christ in God
fixed: Even though daily life and life's circumstances can vary greatly from person to person, everyone has the same possibilities to come to a personal life with Christ in God!
Lev Landaus mother had trained in medicine and she had undertaken work in physiology while his father was a petroleum engineer who worked at the oil fields in Baku on the Caspian Sea Lev was a prodigy in mathematics when he was a child

Can you repeat this sentence, but add in punctuation?
Lev Landau's mother had trained in medicine and she had undertaken work in physiology, while his father was a petroleum engineer who worked at the oil fields in Baku on the Caspian Sea. Lev was a prodigy in mathematics when he was a child.