(*1.cviceni 22. 2. 2016*)
1+1

1+2

(* Takto se pise komentar. *)

(Sqrt[2])

(Sqrt[2.])

N[(Sqrt[2])]

Sin[1.5]

N[(Sqrt[2]),50]

LaplaceTransform
laplacetransform

a=5
b=3

a*b

c*d

c*a

Clear[a]

E=5

E

N[E]

21a

a21

a+6*f*(5+1a-(5-f))

{7,3,5}

Solve[2*x+y==4,3*x+y==5,x,y]

Solve[{2*x+y==4,3*x+y==5},{x,y}]

List[1,2.3,5]

TreeForm[{{5.5,5,8},3,{1,2,8.9,{4,5}}}]

DSolve[{y''[x]+(3+x)*y'[x]+2*y[x]==(x^2)+1,y[0]==1,y'[0]==2},y[x],x]

(*zkratky: (Sqrt[\[Placeholder]]) ctrl+2, (x^\[Placeholder]) ctrl+6, (\[Placeholder]/\[Placeholder]) ctrl+/*)

(*recka pismena: κ Esc+pismeno+Esc)*)

N[π]

π//N

N@π

Plot[{Sin[x],Cos[x],Sin[x]*Cos[x]},{x,0,6Pi}]