Simplify : simplify

### 2.12.14 Simplify : `simplify`

`simplify` simplifies an expression. It behaves like `normal` for rational fractions and algebraic extensions. For expressions containing transcendental functions, `simplify` tries first to rewrite them in terms of algebraically independant transcendental functions. For trigonometric expressions, this requires radian mode (check `radian` in the `cas` configuration or input `angle_radian:=1`).
Input :

`simplify((x-1)*(x+1))`

Output :

`x```^```2-1`

Input :

`simplify(3-54*sqrt(1/162))`

Output :

`-3*sqrt(2)+3`

Input :

`simplify((sin(3*x)+sin(7*x))/sin(5*x))`

Output :

`4*(cos(x))```^```2-2`