Respuesta:
1. 2(3+6) = 2*9 = 18
2. -(6+8)-3 = -14-3 = -17
3. (6+8)-3 = 14-3 = 11
4. - [6+2-(3+6)+5] = -[8-9+5] = -[-1+5] = -4
5. 2(6+3) = 2*9 = 18
6. 3(-6+2) = 3*-4 = -12
7. - (8+6)-3 = -14-3 = -17
8. - 6+5+(3-6)-3 = -6+5-3-3 = -7
9. + (32+5)- = 37
10. (32+8)+5-3 = 40+5-3 = 42