1+1

(Sqrt[5])

(25^(1/4))

N[π]

N[π,40]

N[Pi]
Pi//N
N@Pi
Pi//N[#,30]&
N[#,30]&@Pi

?Inverse*;

1kyncl

(x^3)
(2/4)
(Sqrt[5])

αβ

?Solve

Solve[(x^5)+x-17==0]//N

x*4
x 4
4x

DSolve[(1+(x^2))y''[x]+x*y'[x]+(4-(x^2))*y[x]==0,y[x],x]

Simplify[(Sqrt[x])*((Sqrt[y])/(Sqrt[u])),{x>0,y>0,u>0}]

1.*60!

Solve[(x^2)+3x+8==0.]

Plot

Plot[Tanh[100Sin[x]],{x,-15,15}]

Plot[Tanh[(10^(-4))Sin[x]],{x,-10,10}]

Plot[Tanh[(10^(-4))Sin[x]],{x,-10,10},PlotRange->{{0,16},Automatic},PlotPoints->300]

Plot3D[Arg[x+I*y],{x,-10,10},{y,-10,10},PerformanceGoal->"Quality"]

Plot[Erfc[x],{x,0,5},PlotRange->All,PlotStyle->{Thick,Pink},AxesLabel->{"x","erfc[x]"}]

Plot[{Erfc[x],Erf[x]},{x,0,5},PlotRange->All,PlotStyle->{{Thick,Red},{Thick,Blue}},AxesLabel->{"x","erfc[x],erf[x]"}]

(x^5)+Exp[-x]+Sin[a+b]//SpokenString