- Integrate [ dx / (e^x + e^-x) ] ?

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Are bed bugs hsrd or soft? Are porkypines and hedgehogs the same animal? Can anyone please help with my Statistics problem?**? Please help me Balance equations A: Fe2O3 + H2O —> Fe(OH)3
B: Ca(OH)2 + HNO3 -> Ca(No3)2 + H2O? (BEST ANSWER)
Find fg(3) and gf(3) if f(x) = x + 5 and g(x) =x - 2
URGENT!!!?