He works them out with a pencil.
They work it out with a pencil.
Because they always work problems out with a pencil.
It's not you it's me*iosis* Could probably do with some work on deliver as I made it 5 minutes ago
You get the picture.
Because asteroids was already taken.
If I fits I sitz.
Math teachers, because every student counts.
She worked it out with a pencil.