<img src="https://tex.z-dn.net/?f=%20%283%2F8%2B7%2F6%29-%284%2F12-3%2F24%29%3D%28%5Cfrac%7B9%2B28%7D%7B24%7D%29-%28%5Cfrac%7B8-3%7D%7B24%7D%20%29%20%3D%20%20%5Cfrac%7B37%7D%7B24%7D%20-%20%5Cfrac%7B5%7D%7B24%7D%20%3D%20%5Cfrac%7B32%7D%7B24%7D%20%3D%20%5Cfrac%7B4%7D%7B3%7D%20" /> - 5 / 3÷2 / 7 = <img src="https://tex.z-dn.net/?f=-%20%5Cfrac%7B5%7D%7B3%7D%20%2A%20%5Cfrac%7B7%7D%7B2%7D%20%3D%20%20-%5Cfrac%7B35%7D%7B6%7D%20" />
3 / 8 + 2 - 1 / 6 = <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B9%2B48-4%7D%7B24%7D%3D%20%5Cfrac%7B53%7D%7B24%7D%20%20" />
4 / 17 * ( - 3 / 5)÷(2 / - 6) = <img src="https://tex.z-dn.net/?f=%20-%5Cfrac%7B12%7D%7B85%7D%2F%28%20%5Cfrac%7B2%7D%7B-6%7D%20%29%3D%20-%5Cfrac%7B12%7D%7B85%7D%20%2A%28-%20%5Cfrac%7B6%7D%7B12%7D%20%29%3D%20%20%5Cfrac%7B36%7D%7B85%7D%20" />
( - 2 / 3)÷( - 4 / 7) = <img src="https://tex.z-dn.net/?f=%28-%20%5Cfrac%7B2%7D%7B3%7D%20%29%2A%28-%20%5Cfrac%7B7%7D%7B4%7D%29%20%3D%20%5Cfrac%7B7%7D%7B6%7D%20" />.