1+1

sin[5];
sin[5.1]
Sin[5]
Sin[5.1]
Sin[5.]

1+a

21a=6

21 a

a=1

a

b+a

Sin[5]
Sin[5.]
N[Sin[5]]
Sin[5]//N
5//Sin
5//Sin//N

(franta+pepa)*jarda
franta+pepa*jarda

?=

?==

vysl=Solve[x^2+d*x+1==0,x]

vysl[[2]]
vysl[[2]]/.d->3

x/.{x->(1/2) (-3+(Sqrt[5]))}

Solve[(x^3)+d*(x^2)==14*c,x];

?Plot

Plot[Sin[bohous],{bohous,-2,3},PlotLabel->"Nazev grafu",AxesLabel->{"osa x","osa y"},PlotStyle->{RGBColor[1,0,0],Thickness[0.01]}]

Plot[{Sin[bohous],Cos[bohous]},{bohous,-2,3},PlotLabel->"Nazev grafu",AxesLabel->{"osa x","osa y"},PlotStyle->{{RGBColor[1,0,0],Dashing[0.02]},{Thickness[0.01],RGBColor[0,1,0]}}]

Plot3D[Sin[x+y^2],{x,-3,3},{y,-2,2}]

listik={1,2,3,opice,Sin[6]}

listik[[3]]

listik2={1,2,3,{opice,krava,{pes,kocka}},Sin[6]}

listik2[[5]]
listik2[[4,3,1]]
listik2[[-4]]

Table[i,{i,1,10}]
Table[2i,{i,1,10}]
Table[Sin[i],{i,1,10}]