先化简在求值【(2y-3x)(-3x-2y)-(-3x+y)²-2y/3(3x-y+3xy²)】÷(-4y)其中

先化简在求值【(2y-3x)(-3x-2y)-(-3x+y)²-2y/3(3x-y+3xy²)】÷(-4y)其中x=-2 y=-3

【(2y-3x)(-3x-2y)-(-3x+y)²-2y/3(3x-y+3xy²)】÷(-4y)
=【9x²-4y²-(9x²-6xy＋y²)-(2xy-2y²/凳槐3+2xy³枣历友)】÷(-4y)
=【9x²-4y²-9x²+6xy-y²-2xy+2y²/3-2xy³】÷(-4y)
=(-13/3y²+4xy-2xy³)÷(-4y)
=13/12y-x+1/烂蔽2xy²
=13/12×(-3)-(-2)+1/2×(-2)×(-3)²
=-13/4+2-9
=-13/4-7
=-41/4