1+1

5!

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

2x + 3x

Expand[(x+y)(x-y)]

Expand[(x+y)^3]

Factor[x^3+y^3+z^3-3 x y z]

D[x^3,x]

D[Sin[x]Cos[x],x]

D[Exp[x],x]

Integrate[x^3,x]

Integrate[Exp[x] Sin[x],x]

Integrate[1/(x^2-1),x]

Integrate[x^2,{x,0,1}]

Integrate[(x-a)(x-b),{x,a,b}]

Factor[%26]

Pi

E

N[Pi]

N[Pi,10]

N[Pi,100]

N[Sin[1]]

Limit[Sin[x]/x,x->0]

{1,2,3} + {4,5,6}

3{1,2,3}

{1,2,3}[[2]]

{1,2,3} . {2,-1,4}

Norm[{1,2,3}]

{{1,2},{3,4}} + {{5,6},{7,8}}

{{a,b},{c,d}}.{a,b}

{{a,b},{c,d}}[[1,2]]

MatrixForm[{{a,b},{c,d}}]

Inverse[{{1,2},{2,3}}]

{{1,2},{2,3}}.%%

Det[{{1,2},{3,4}}]