There are no parentheses or exponents, so the Order of Operations tells you to start by performing division and multiplication left to right.
7-3+4÷2×6
= 7-3+2×6
= 7-3+12
After you have done that, you perform addition and subtraction left to right.
= 4 +12
= 16
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A Google or Bing search box will evaluate expressions such as this according to the order of operations.