(* 1. cviceni 11 - 12:30 *)

1+1*9

13-5

(Sqrt[20.])

N[(Sqrt[20])](* komentar *)

N[(Sqrt[20]),100]

N[1/15]

(Sqrt[(Sqrt[(Sqrt[(Sqrt[(Sqrt[(Sqrt[(Sqrt[10])])])])])])])

(2^(2^2))

a=555

a

(a^2)

b=10;

(a/b)

(A/b)

C=10*(10^(-6))

Pi=111

N[π,20]

21a

21a=10

R10=100;

((1+1)+10)*3+(1+(21+(1+2)+2)+1)

TreeForm[{{1,1,1},{1,a,b}}]

List1={1,1,1};
List2={1,a,b};
ListListu={List1,List2}

Integrate[(x^10)*Sin[x],x];

f=Solve[{z==0,15x+z+5==0},{x,z}]

graf1=Sin[2*x];

Plot[{graf1,Cos[2*x],Sin[x],Cos[x]},{x,-2*π,2*π},PlotLegends->"Expressions"]