1+1

a=2;
b=a-1;
c=a-b;

(Sqrt[5])

(Sqrt[5.]);
N[(Sqrt[5])];
aa=n[(Sqrt[5])]

n=Sin;
aa

N[Sqrt[5],140]

InverseLaplaceTransform[((p+1)/((p^3)+2p+1.)),p,t];

opice 12

kyncl*je*vul

Solve[x^2+ x+13==0,x]

Simplify[(Sqrt[g])*(Sqrt[h])*(Sqrt[ρ]),{g>0,h>0,ρ>0}]

Integrate[(x^17.25)*Sin[1+(x^3)],x]

Plot3D[Sin[x*y-1],{x,-Pi,Pi},{y,-Pi,Pi}]

%20;

$HistoryLength=2;

x=1;
ClearAll[x]
Solve[x==1]

Sin[x]
Sin@x
x//Sin

Sin[(Sqrt[5])]//N

150!//N

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