Find the number of orange marbles. 13 marbles - 9 marbles = <<13-9=4>>4 marbles
Find the number of purple marbles. 4 marbles x 4 = <<4*4=16>>16marbles
Find the total amount of pink, orange, and purple marbles. 13 marbles + 4 marbles + 16 marbles = 45 marbles
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