-1²-[1又3/7+(-12)÷6]²×(-3/4)³

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-1²-[1又3/7+(-12)÷6]²×(-3/4)³-1²-[1又3/7+(-12)÷6]²×(-3/4)³-1²-[1又3/

-1²-[1又3/7+(-12)÷6]²×(-3/4)³
-1²-[1又3/7+(-12)÷6]²×(-3/4)³

-1²-[1又3/7+(-12)÷6]²×(-3/4)³
-1²-[1又3/7+(-12)÷6]²×(-3/4)³
=-1-(1+3/7-2)²×(-27/64)
=-1-16/49×(-27/64)
=-1+27/196
=-169/196;