The solutions will depend entirely on the problems which have not been given.
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The Gutenberg Bible was simply an edition of the Vulgate, therefore written in Latin.
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The New Testament was originally written in Greek, in its entirety. Therefore the authors themselves wrote the 'Greek edition', although scholars are not sure in some cases who those authors really were.
The answer will depend on the nature of the differential equation.
Leibniz had the audacity to take his case to the Royal Society, where Issac Newton was president. Needless to say, Leibniz's complaint was tabled. So, calculus is still considered founded by both men, though we use more of the Leibniz methods because the tract Newton wrote, The Principia Mathamatica, was impenetrable to all but a few mathematicians for years after written.