1+1

Sin[25.]

{1,6,5}

(5-(3+Sin[x]))

myvar=5

(Sqrt[2])

(Sqrt[4])

(Sqrt[2.])

N[(Sqrt[2]),100];

var=5;

var =5

(*vari=5*)

vari
var

(Sqrt[6])(*ctrl+2*);
(5^6) (*ctrl+6*);
(7/6)(*ctrl+/*);

∫(t^7)*(E^t)\[DifferentialD]t

DSolve[y''[t]+3*y'[t]+6*y[t]==Sin[t],y[t],t]

vari=5
Solve[vari==5]

Solve[varib+3==5]

vari=6
vari==5

DSolve[y'[t]==6,y[t],t]

Solve[5+y==3,y]

Solve[{x+y==3,x-y==5},{x,y}]

1 2

∫Sin[x]*Cos[x]\[DifferentialD]x

myLap=LaplaceTransform[(((Sin[t]))^4),t,s]

myInvLap=InverseLaplaceTransform[myLap,s,t]

t=5;
Plot[Sin[x],{x,0,6Pi},AxesLabel->{"t [s]","sin(t) "},PlotLabel->"Current",PlotStyle->{Thick,Dashed,Red}]

DSolve[{y'[t]+5*y[t]==Sin[t],y[0]==3},y[t],t]
ClearAll[t]
sol=y[t]/.DSolve[{y'[t]+5*y[t]==Sin[t],y[0]==3},y[t],t][[1]]

a/.a->3

b/.{a->3,b->2}

Plot[sol,{t,0,6Pi},AxesLabel->{"t [s]","sin(t) "},PlotLabel->"Current",PlotStyle->{Thick,Dashed,Red}]

TreeForm[{1,2,5,{3,1},6}]

{1,2,5,{3,1},6}[[4,3]]