(2x²/3y²)*(5y/6x)/(10y、21x²)(2x²/3y²)*(5y/6x)/(10y/21x²)
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(2x²/3y²)*(5y/6x)/(10y、21x²)(2x²/3y²)*(5y/6x)/(10y/21x²)
(2x²/3y²)*(5y/6x)/(10y、21x²)
(2x²/3y²)*(5y/6x)/(10y/21x²)
(2x²/3y²)*(5y/6x)/(10y、21x²)(2x²/3y²)*(5y/6x)/(10y/21x²)
原式=(5x/9y)*21x^2/10y=7x^3/(6y^2)