- (5b/7)-(a-b/4)?

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Why is always a problem in recent years, aircraft, whether artificially or incidents? Ayuda me sale error al intentar subir una foto a mi pregunta :((? Naphthalene sublimation rate=3*10^-5/min. Volume of room=60m^3. How would I calculate the naphthalene concentration in the air of the room? What is the difference between an african kente hat and a kuli kofia koofi hat? Find integers x and y such that 57x+79y=17, and 400