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Does anyone knows of a reliable outdoor LPWAN Gateway (Base Station), open software can give a range of min 5km and a price below$1000 ? Difference between tubular secretion and counter current exchange? Solve the diffrential equation (y^3 x^2 -my)dx+(x^3y^2+nx)dy=0 i try to use exact and integration factor but i got stuck at some point? What is the difference between a basis, subset, and subspace in linear algebra? Where are jaguars found?