【-2的4次方÷（-2有3分只2）的2次方+5有2分只1×（-6分只1）-4分只1】÷12分只1 =[16÷64/9+(-11/12)-1/4]÷1/12 =(9/4-11/12-1/4)÷1/12 =13/12÷1/12 =13/12×12 =13
