## Simplification

Some signs in mathematics are implicit, that is, they do not need to be written.

If an expression, for instance, contains two times x, the multiply sign between 2 and x is usually not written.

The same applies, when a number is multiplied to parentheses.

The plus signs in front of a numbers are also usually omitted.

For example:

The addition of 1 and 2 is written like 1 + 2 = 3, not +1+2=+3.

Exponents can be used to simplify mathematical expressions.

The expression can be simplified by substituting the three times c with c raised to the third exponent.

And it can be even more simplified, because we do not need to write the times signs either:

If 1 is the factor of something it is usually omitted too. Instead of writing 1a, you can just write a.