The phrase 'this can be complicated' is correct and usable in written English.
You can use it when describing a situation that may be challenging or difficult to understand. For example: "Trying to balance both work and family obligations can be complicated."
This can be complicated further if there are potentially life-changing stock options involved, which usually can only be exercised within a few months of termination.
And you see that, probably you seen on P-sets and an example we did in the lecture that this can be complicated.
This can be complicated if related proteins are present in a sample, because they share identical stretches of amino acid sequences, but in general is relatively straightforward. .
This can be complicated if there is more than one adult in the household, as in the case of multigenerational families.
This can be complicated, but it's crucial.
This can be complicated when people are in open relationships.
Reactions by this mechanism can be complicated by the intervention of intermediates that are more complicated structurally.
However, this interpretation can be complicated by the complex dependence of the BOLD signal on both neural and vascular factors.
This task can be complicated by the reality that some Chinese immigrants resist asking for assistance in order to save face.
Some self-publishers strongly recommend spending money on help with formatting both print and e-books; this process can be complicated, time-consuming and frustrating to do yourself, though by no means impossible if you are patient and technologically adept.
However, with the abundance of constitutive theories available it can often be difficult to differentiate among them, and this selection can be complicated by new and conflicting mechanical characterization data.
