Zend certified PHP/Magento developer

Formula not showing a result but only the formula

Does anyone see why this formula is not going into effect? When I hit enter, the formula simply shows the formula versus a result.

This was working fine before I made a few changes. Also, if there is a good syntax error checker that someone would recommend, that would be great!

=TRIM(
IFERROR(
IF(AND($T9-TODAY()>=Key!$N$14,$T9-TODAY()<=Key!$M$14,$AA9<>"Complete”),Key!$L$11,"")
& " "
& IF(AND($U9-TODAY()>=Key!$N$15,$U9-TODAY()<=Key!$M$15,$AB9<>"Complete"), Key!$L$10,"")
& " "
& IF(AND($M9-TODAY()>=Key!$N$9,$M9-TODAY()<=Key!$M$9,$Z9<>"Complete"),Key!$L$9,"")
& " "
& IF(AND($AH9-TODAY()>=Key!$N$16,$AH9-TODAY()<=Key!$M$16,$AE9<>"Complete"),Key!$L$16,"")
,"error"))