【1】n-3[4-2m] =n-12+6m
【2】t+3分之2[12-9v]= t+8-6v
【3】-2分之1[x+y]+4分之1[p+q]=1/4*p+1/4*q-1/2*x-1/2*y
【4】4[m+p]-7[n-2q]=4m+4p-7n+14q
【1】n-3[4-2m] =n-12+6m
【2】t+3分之2[12-9v]= t+8-6v
【3】-2分之1[x+y]+4分之1[p+q]=1/4*p+1/4*q-1/2*x-1/2*y
【4】4[m+p]-7[n-2q]=4m+4p-7n+14q