The earliest **algebra** consists in the solution of equations.

But when I took up **algebra** I had a harder time still.

In **algebra** he discovered the method of approximating to the real roots of an equation by means of continued fractions, and imagined a general process of solving **algebra**ical equations of every degree.

The theories of determinants and of symmetric functions and of the **algebra** of differential operations have an important bearing upon this comparatively new branch of mathematics.

But, when I took up **Algebra**, I had a harder time still--I was terribly handicapped by my imperfect knowledge of the notation.