Question: Pls explain those three red question marks (as clear as possible). (T-X)ZtlRL+ (f x) -r + XL +2C+RL -xlt 3 J 44 R+RZ-xL -tR&-xL
Pls explain those three red question marks (as clear as possible).

(T-X)ZtlRL+ (f x) -r + XL +2C+RL -xlt 3 J 44 R+RZ-xL -tR&-xL
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