(-1/2xy)(2/3x^2y-3/2xy^2+6/5y)
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(-1/2xy)(2/3x^2y-3/2xy^2+6/5y)(-1/2xy)(2/3x^2y-3/2xy^2+6/5y)(-1/2xy)(2/3x^2y-3/2xy^2+6/5y)(-XY/2)(2X
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