The phrase "more complex than expected" is correct and can be used in written English.
It is used to indicate that something is more difficult or complicated than initially anticipated. For example, "The assignment was more complex than expected and required a great deal of additional research."
Chemoresistance of glioblastoma cancer stem cells much more complex than expected.
The genetic analysis of common disease is turning out to be a lot more complex than expected.
This result suggests that the response of shorebirds to human-induced perturbations is much more complex than expected.
In such case, the salt-forming regions can be different and more complex than expected based on the equilibrium diagram.
However, implementing a new curriculum with new teaching and learning methods can be more complex than expected.
But the cases have proven to be more complex than expected, in part because of new evidence turned up at each step.
The pattern of empirical findings thus is more complex than expect.
We then determined which of these pairs occurred in more complexes than expected by chance.
On the other hand, it has recently been observed for a set of 390 protein complexes in yeast, that essential genes are absent in significantly more complexes than expected [ 19].
In contrast, for genes that reduce fitness when they are over-expressed, only two bins contain more complexes than expected by chance – one complex has 80 90% of tested subunits with an over-expression phenotype (compared to 0.01 expected, p = 0.006) and 5 complexes have >90% of tested subunits with an over-expression phenotype (1.54 expected, p = 0.02).
Dave realizes that fitting into their new community is more complex than he expected, but if he can find a way to connect with Calvin, they have an excellent chance of making their new neighborhood their home.
