Help with syntax for a mathematical operation with piped text?

Hello all,

I am attempting to use the following line of syntax:

$e{ ( abs(118 - q://QID72/ChoiceTextEntryValue ) + abs(35 - q://QID84/ChoiceTextEntryValue ) + abs(76 - q://QID88/ChoiceTextEntryValue ) + abs(37 - q://QID92/ChoiceTextEntryValue ) + abs(112 - q://QID96/ChoiceTextEntryValue ) + abs(56 - q://QID100/ChoiceTextEntryValue ) ) / 6 }

The syntax is supposed to calculate the absolute value for 6 responses subtracted from a preset number, sum these 6 responses, and divide by 6 to provide the mean. The equations to calculate the absolute values are working correctly when tested in isolation, so the issue appears to be related to the fact that I have multiple levels of parentheses. Instead of dividing by 6 at the end, I could also try a mean function if one exists.