3+2
4+7

y=2

x=7

z=2;

1/5+6/9

1/3//N

1/2.0

Pi

Pi//N

3+I*5

(Sqrt[4])

Sin[1]//N

Sqrt[4]

Pi/4//Sin

N[Pi]

N@Pi

?Sin

π+δ+α

3 5

a=4

b=5

3a+2b

G=G

(*GONZAJ WAS HERE*)

x=10;
y=25;
z=8;
x^2+5y-6z

ClearAll[x]

x+y

ClearAll["Global`*"]

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

Plot[Cos[x],{x,0,2Pi}, PlotStyle->Red]

x={1,3,7,9,12,15}

x[[2]]

Append[x,4]

y={5,6,8,0}

Join[x,y]

matice={{3,12,5},{7,9,1},{5,6,8}}//MatrixForm

({{5}, {5}})

({{5}, {5}, {5}})

{{5},{5},{5}}//MatrixForm

prepona[a_,b_]:=Sqrt[a^2+b^2]

prepona[3,6]