1. Define the operation " $\odot$ " as $\mathrm{a} \odot \mathrm{b}=\mathrm{a} \times \mathrm{b}-(\mathrm{a}+\mathrm{b})$, please calculate: $6 \odot(5 \odot 4)=$
```
& 64=5 \times 4-(5+4)=11 \\ 
& 6 \bigcirc 11=6 \times 11-(6+11)=49
``` 

Translation:

```
& 64=5 \times 4-(5+4)=11 \\ 
& 6 \bigcirc 11=6 \times 11-(6+11)=49
```