Question: In 1872 he was elected to be Head of the Union of Czech Mathematicians and Physicists
Please fix the punctuation.
Fixed: [In 1872 he was elected to be Head of the Union of Czech Mathematicians and Physicists .]

Question: A reliable and complete solution for SCORM in Sakai
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Fixed: [A reliable and complete solution for SCORM in Sakai]

Question: Arthur M Sackler Gallery Code For Your Website Earth in Pictures
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Fixed: [Arthur M. Sackler Gallery - Code For Your Website - Earth in Pictures]

Question: Unstable angina is often a precursor to a heart attack
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Fixed:
[Unstable angina is often a precursor to a heart attack.]