(1)计算:(-3xy)²·2x³÷(-6x² y);=9x²y²×2x³÷﹙-6x²y﹚=-3/2x³y(2)化简：[(2x+y)²-y(y+4x)-8x]÷2x.=(4x²+4xy+y²-y²-4xy-8x)÷2x=(4x²-8x)÷2x...