分解因式①5a^2b÷(-1/3ab)*(2ab^2)^2 ②(3a^2b-4ab^2-5ab-1)(-2ab^2) ③(3x-2y)(y-3x)要过程!

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分解因式①5a^2b÷(-1/3ab)*(2ab^2)^2 ②(3a^2b-4ab^2-5ab-1)(-2ab^2) ③(3x-2y)(y-3x)要过程!
分解因式①5a^2b÷(-1/3ab)*(2ab^2)^2 ②(3a^2b-4ab^2-5ab-1)(-2ab^2) ③(3x-2y)(y-3x)要过程!

分解因式①5a^2b÷(-1/3ab)*(2ab^2)^2 ②(3a^2b-4ab^2-5ab-1)(-2ab^2) ③(3x-2y)(y-3x)要过程!
①5a^2b÷(-1/3ab)*(2ab^2)^2
=-15a×4a^2b^4
=-60a^3b^4
②(3a^2b-4ab^2-5ab-1)(-2ab^2)
=-6a^3b^3+8a^2b^4+10a^2b^3+2ab^2
③(3x-2y)(y-3x)
=3xy-9x^2-2y^2+6xy
=-9x^2-2y^2+9xy