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(t+4)^2-(t+4)-12=0
We get rid of parentheses
(t+4)^2-t-4-12=0
We add all the numbers together, and all the variables
-1t+(t+4)^2-16=0
We move all terms containing t to the left, all other terms to the right
-1t+(t+4)^2=16
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