21+[36devided (12-6) + 2-5]multiply3

12-6=6

6+2=8-5=3

21+3x3=72

37.5 thats what i say ... (imclaires little sister so im secretly on here dont tell ...) she hates getting questions wrong she is always getting As and A + in all her grades ... sometimes im jelous of her. but i hope this question isnt wrong becouse if she finds out im gonna be dead meat.