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(100 (1500 (100 + y)^2 + (1 + y/100)^n (-15000000 + (-150000 + X) y)))/(y (100 + y))
(100 (1500 (100 + y)^2 + (1 + y/100)^n (-15000000 + (-150000 + X) y)))/(y (100 + y))
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