Arthur D. answered 03/02/16
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6X(5+7)/4-7x2+3x3
use the order of operations
grouping symbols
exponentiation (raise to a power)
multiply and divide in order from left to right whichever occurs first
add and subtract in order from left to right whichever occurs first
6x(12)/4-7x2+3x3
72/4-7x2+3x3
18-7x2+3x3
18-14+9
4+9
13