1 + 1
 + 1

2^4

(2^4)

2*(3 + 1)

2 (3 + 1)

a = 2

b = 4

a*b

ab

a b

3.1*10^16

Sin[Pi/4]

Degree

Pi/4 Degree

Degree[Pi/4]

N[Degree]

Sin[45 Degree]

(∫_0^3.1415926535) Sin[x] \[DifferentialD]x

N[Pi]

N[Pi, 100]

Pi  //  Sin

1000!

Exp[1]

Exp[1.0]

E^1.0

ArcTan[1]

Tan[Pi/4]

ArcTan[Tan[Pi/4]]

I

Exp[Pi*I]

(1 + 2  I) (3 + 4  I)

%34/(3 + 4  I)

a = 2

b = 3

a*b

a = 4

a = x + 1

b = x + 2

a*b

Expand[a*b]

v  =  {1, 2, 3}

v^2

v/v

Exp[v]

v[1]

v[[1]]

v  =  {1, 2, 3}

v[[2]]

v  =  v^2

v[[3]]

v[[2]]

Plot[{Cos[x], Sin[x]}, {x, 0, 2 Pi}]