(3x^/4y)^*2y/3y+x^2y^÷2y^/x 还有一个 (a+b/a-b)^*(2a-2b/3a+3b)-a^
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(3x^/4y)^*2x/3y+x^2y^÷2y^/x

=9x^4/16y²*2x/3y+x²y²÷2y²/x

=3x³/8y+x/2

(a+b/a-b)^*(2a-2b/3a+3b)-a^/a^-b^÷a/b

=(a+b)²/(a-b)²*2/3*(a-b)/(a+b)-a²/(a²-b²)÷a/b

=2/3*(a+b)/(a-b)-ab/(a²-b²)

=2(a+b)²/3(a²-b²)-3ab/3(a²-b²)

=(2a²+4ab+2b²-3ab)/(3a²-3b²)

=(2a²+ab+2b²/(3a²-3b²)

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