Como ubicar paréntesis corchetes y llaves en
Δ5 + 4÷3 + 2×5 - 8÷2 + 3 = 12
<img src="https://tex.z-dn.net/?f=%5Cleft%5B%5Cleft%285%2B4%5Cright%29%5Cdiv%20%5C%3A3%5Cright%5D%2B%5Cleft%282%5Ccdot%205%5Cright%29-%5Cleft%288%5Cdiv%20%5C%3A2%5Cright%29%5C%3A%2B3%0A%0A3%2B%5Cleft%282%5Ccdot%20%5C%3A5%5Cright%29-%5Cleft%288%5Cdiv%20%5C%3A2%5Cright%29%2B3%0A%0A3%2B10-%5Cleft%288%5Cdiv%20%5C%3A2%5Cright%29%2B3%0A%0A3%2B10-4%2B3%0A%0A12" />
Δ238 - 8 + 4×4 + 20÷5 + 10×6 = 126
<img src="https://tex.z-dn.net/?f=238-%5Cleft%5C%7B%5Cleft%28%5Cleft%288%2B4%5Cright%29%5Ccdot%204%5Cright%29%2B%5Cleft%2820%5Cdiv%20%5C%3A%5C%3A5%5Cright%29%2B%5Cleft%2810%5Ccdot%206%5Cright%29%5Cright%5C%7D%0A%0A238%20-%20%5B48%20%2B4%2B60%5D%0A%0A238%20%20-%20%20112%0A%0A126%0A%0A" />
Δ58 + 65 - 35 + 2×13 - 8×2 + 24 = 122
<img src="https://tex.z-dn.net/?f=58%2B%5Cleft%2865-35%5Cright%29%2B%5Cleft%5B%5Cleft%282%5Ccdot%20%5C%3A%5C%3A13%5Cright%29-%5Cleft%288%5Ccdot%20%5C%3A%5C%3A%5C%3A2%5Cright%29%5Cright%5D%2B24" />
<img src="https://tex.z-dn.net/?f=8%2B30%2B%5Cleft%5B%5Cleft%282%5Ccdot%20%5C%3A13%5Cright%29-%5Cleft%288%5Ccdot%20%5C%3A2%5Cright%29%5Cright%5D%2B24%0A%0A58%2B30%2B10%2B24%0A%0A122" />.