order of operation (100-7 x 2+3) /10
do parens first, separately. Within them, multiplication first:
(100-7x2+3)
(100-14+3)
Now add/subtract, left to right
(86+3)
(89)
Now you have
89/10 = 8.9
(100-7x2+3)
(100-14+3)
Now add/subtract, left to right
(86+3)
(89)
Now you have
89/10 = 8.9