The general study of Calabi-Yau manifolds is mathematically complex and for a long time examples have been hard to construct explicitly.

The calculation of the exact magnetic field at any point in space is mathematically complex and involves the study of Bessel functions.

Charlie gets some mathematically complex idea, which leads to his girlfriend figuring out how to model the idea on a computer.

At scan rates slower than those of the linear region is a region which is mathematically complex to model and rarely investigated.

Subjective logic allows extremely efficient computation of mathematically complex models.

Voice engines are highly optimized software subsystems due to the mathematically complex signal processing required for voice filtering and speech coding.

What a mathematically complex world!

Fluid mechanics can be mathematically complex.

The technique is mathematically complex, and requires significant care in setting up and processing data.

Models can be more mathematically complex where "...several competing hypotheses are simultaneously confronted with the data."