(25/88-5/108+5/144)*(9/25-1又4/5)

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(25/88-5/108+5/144)*(9/25-1又4/5)

(25/88-5/108+5/144)*(9/25-1又4/5)
(25/88-5/108+5/144)*(9/25-1又4/5)

(25/88-5/108+5/144)*(9/25-1又4/5)
(25/88-5/108+5/144)*(9/25-1又4/5)
=5/4*(5/22-1/27+1/36)*9/5*(1/5-1)
=(5/4*9/5)*259/118*(-4/5)
=9/4*(-4/5)*259/1188
=-9/5*259/1188
=-259/660