1+1

2+4

6+1
a+b

(Sqrt[5])

(25^(1/4))

(Sqrt[5.])

N[(Sqrt[5])]

N[(Sqrt[5]),20]

?Sin

(a+1)-(b-c)
((a+1)-(b-c))*(a/3)

MatrixForm[{{2,4},{5,13}}]

ClearAll[a,b,soucet](*tohle je komentar*)
a=5;
b=7;
soucet=a+b
2*soucet
soucet1

a=3

ClearAll[a]

Sin[Pi/3]
N[Sin[Pi/3],50]

LaplaceTransform[(E^(t+2))*(t^4)+Sin[2*t+0.4],t,s]

e;
E;
N[E];
E//N;
N@E;

100!//N

Plot[(t^4)*Cos[5*t+1]-3,{t,0,3Pi}]

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