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Mathematics, 22.09.2020 21:01 j015

Calculati: \frac{2}{3 \times 5}  +  \frac{3}{5 \times 8}  +  \frac{4}{8 \times 12}  +  \frac{5}{12 \times 17}  +  \frac{6}{17 \times 23}  +  \frac{7}{23 \times 30}
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