(x+2y)(3x-5y)-(6x⁴y²-2x²y²）÷（2x²y²）=(x+2y)(3x-5y)-2x²y²(3x²-1）÷（2x²y²）=(3x²-5xy+6xy-10y²)-(3x²-1）=3x²-5xy+6xy-10y&#...