You can put this solution on YOUR website! 4 + 4*3 + 4*3*3 + 4*3*3*3 + 4*3*3*3*3 + 4*3*3*3*3*3 + 4*3*3*3*3*3*3 = ?
4 + 12 + 36 + 108 + 324 + 972 + 2916 = 4372
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answer:
4372
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