1+1

(Sqrt[5])

(Sqrt[4])

(Sqrt[5.])

N[(Sqrt[5])]

N[(Sqrt[5]),25]

N[2,2]

(5^2)

LaplaceTransform
function=25

function*2

Solve[(x^2)+2*x+5*t==1,x]

t=5

list={1,5,{3,2},4,6}

list[[3,2]]

FullForm[list]

N[Sin[Cos[(E^Pi)]]]

t

t=25

ClearAll[t]

mySolve=Solve[(x^2)+2*x+5*t==1,x]

mySolve[[1]]

Plot[(E^x)*(E^(Sin[(x^2)])),{x,0,6Pi}]

mySolve=Solve[(x^2)+2*x+5*t==1,x]

x=x/.mySolve[[1]]

Plot[-1-(Sqrt[2-5 t]),{t,-5,5}]

ClearAll[x]
myRules={x->10,x->2,x->3}

x/.myRules

myRules2={x->1,y->2,z->3}

{x+y,y,y+a}/.myRules2

mySolve=Solve[5*x==1,x]

Plot[x/.mySolve,{x,1,5}]

myList={1,5,4,6,8,9}

myList[[-1]]

Length[myList]

Sort[myList]

N[(Sqrt[5])]

(Sqrt[5])//N

N@(Sqrt[5])