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How can I participate in Week Nuclear and Strong Nuclear fields? Have you bought a WMF appliance? WhaT number produces a rational number when multiplied by 1/5? Would the white blood cell count of a person with sickle cell anemia be different from the normal range for a healthy person? How to Write the expression -3x 2 + 2y 2 + 5xy - 2y + 5x 2 - 3y 2 in simplest form?