\frac{2}{3}+\frac{5}{6}\times\frac{1}{2}=\:\frac{2}{3}+\frac{5}{12}=\frac{\left(2\times4\right)}{\left(3\times4\right)}+\frac{5}{12}=\frac{8}{12}+\frac{5}{12}=\frac{13}{12}
or 1\frac{1}{12}
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Math question: Find the 4th derivative of y = cos(2x) - e^x.
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Math question: In triangle ABC, if the bisector of angle A intersects side BC at point D, and AD = 8 cm and DC = 10 cm, what is the length of side BC?
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What is the length of the hypotenuse if one leg of a right triangle measures 4 units and the other leg measures 3 units?