Play with function

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Chef is currently learning about function in mathematics and his teacher asks him to find the solution of a given problem. Given F(X) - F(X-1) - X2 = 2X+5 and F(0)=15 He has to find out F(N) where 1<=N<=1000. Your task is to help chef to solve this problem. Note: Since the answer can be very large, find the value modulo 10^9+7. ### Input - The first line of input contains a single integer T,

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solution.cppC++17

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