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Why is the earth not flat pls help me? How to Write the expression -3x 2 + 2y 2 + 5xy - 2y + 5x 2 - 3y 2 in simplest form? Whats the structures of CrO4 and Cr2O4? If h(x) = sqrt(6 + 5f(x)),where f(2) = 6 and f'(2) = 3,find h'(2).? There are tornado warnings and I'm having the worst anxiety and these tornado things will last for a couple of hours