I don’t understand any of these questions can y’all help

Answer:
2. 20-9=13
3. 17-2(7)=3
4. 5 with the little 2 -4=21
5. (5-3) with the tiny 2 =4
6. 6+6 with the tiny two =144
7. 12+2(12)=36
8. 9(7)-5(7)=28
9. 4×(21-3(5))=24
10. 7(7)-9(5)=4
11. 10 with the tiny 2-9(9)+3=22
12. 3(7)+4(10)÷2=30.5
Step-by-step explanation:
it's just like a regular math problem just replace all the letters with what they equal as a number and then it's a normal problem.