{9 - [2 - (1 - 5)]} - [4 - (5 - 4) + ( - 5)]?
{9 - [2 - (1 - 5)]} - [4 - (5 - 4) + ( - 5)].
{9 - [2 - (1 - 5)]} - [4 - (5 - 4) + ( - 5)].
En resumen
<img src="https://tex.z-dn.net/?f=%5B9%20-%5B2-%281-5%29%5D%5D-%5B4-%285-4%29%2B%28-5%29%5D" /> <img src="https://tex.z-dn.net/?f=%5B9%20-%5B2-%28-4%29%5D%5D-%5B4-%281%29%2B%28-5%29%5D" /> <img src="https://tex.z-dn.net/?
Bbli
<img src="https://tex.z-dn.net/?f=%5B9%20-%5B2-%281-5%29%5D%5D-%5B4-%285-4%29%2B%28-5%29%5D" />
<img src="https://tex.z-dn.net/?f=%5B9%20-%5B2-%28-4%29%5D%5D-%5B4-%281%29%2B%28-5%29%5D" />
<img src="https://tex.z-dn.net/?f=%5B9%20-%5B2%2B4%5D%5D-%5B4-1-5%29%5D" />
<img src="https://tex.z-dn.net/?f=%5B9%20-%5B6%5D%5D-%5B-2%5D" />
<img src="https://tex.z-dn.net/?f=%5B3%5D%20-%20%5B-2%5D" />
<img src="https://tex.z-dn.net/?f=%3D%205" />.