Case 1: 5*10-2 evaluates to 40.

Case 2: (5*10)-2 evaluates to 48.

Case 3: 103 evaluates to 103.

Case 4: (103) evaluates to 103.

Case 5: (((((103))))) evaluates to 103.

Case 6: 1-2-3-4-5-6-7-8-9-10 evaluates to -5.

Case 7: ((((((((1-2)-3)-4)-5)-6)-7)-8)-9)-10 evaluates to -53.

Case 8: 4*(5*3-(3+5))-8 evaluates to -132.

Case 9: 5*4*3*2*1*0 evaluates to 0.

Case 10: 0-0-5280 evaluates to 5280.