(3x²y-xy²+1/2xy)÷(-1/2xy)

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(3x²y-xy²+1/2xy)÷(-1/2xy)(3x²y-xy²+1/2xy)÷(-1/2xy)(3x²y-xy²+1/2xy)÷(-1

(3x²y-xy²+1/2xy)÷(-1/2xy)
(3x²y-xy²+1/2xy)÷(-1/2xy)

(3x²y-xy²+1/2xy)÷(-1/2xy)
原式=--6x+2y--1.