Why, I can do long, complicated quadratic equations in my head quite easily, and it is great fun!

He had a natural affinity with numbers, and could work out complicated equations in his head at four or five times the average human rate.

And what they amount to is the most complicated simultaneous equation you could possibly imagine.

More complicated equations than presented must be used in cases where there is convection.

All she could do was add another factor to a complicated equation.

This is usually the method we use for complicated ordinary differential equations.

Whom to root for, and why, becomes a complicated equation.

The cuts are derived from a complicated equation to reduce and monitor spending.

"I'd be less impressed if it were a big complicated equation."

Yes, life is a complicated equation, and each of us will weigh the factors differently.