Answer:
126
Step-by-step explanation:
When there is ( ) the number inside must always go first so when you plus 2 and 4 you get 6 and then you need to time your 7 and 3 which you get 21 and then you see no other sign but if there were no sign between the ( ) and the number out side, then you must time those number which means you times 6 and 21 and got 126
