(9x²-2xy)*(5xy²+3y)
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(9x2−2xy)(5xy2+3y)
=(9x2+−2xy)(5xy2+3y)
=(9x2)(5xy2)+(9x2)(3y)+(−2xy)(5xy2)+(−2xy)(3y)
=45x3y2+27x2y−10x2y3−6xy2
=45x3y2−10x2y3+27x2y−6xy2
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