Mình sửa đề tí nha
`{3+0,75-3/19}/{5/2+0,625-5/38}.{15+15/17-15/144+15/34)/(2+2/17-2/144-2/34}`
`={6/2+0,75-6/18}/{5/2+0,625-5/38}.{15+15/17-15/144+15/34)/{2+2/17-2/144-2/34}`
`={6.(1/2+0,125-1/18)}/{5.(1/2+0,125-1/18)}.{15.(1+1/17-1/144+1/34)}/{2.(1+1/17-1/144+1/34)}`
`=6/5. 15/2`
`=9`