%Gilles Mora
1 setxyrapport
60 setxunit
7.5 setborder
90 setangle_repere
-1 5 setxrange
-2 3 setyrange
1 1 settkstep
.5 .5 setsubtkstep
2 2 setmkstep
ticks
subticks
marks
traceaxes
axesarrow
%unites
/f {setxvar
#rpn#   (x^5-5)/(x^4-6)-4
} def
/f' {setxvar
#rpn#   2*(x-3)
} def
/g {setxvar
#rpn#   x
} def
gsave
   noir
   .75 setlinewidth
   continu
  0.1  10 {f} Courbe
grestore

<latex>
$O$
</latex>
0 0 [1 dup] dltexlabel

<latex>
$x=a$
</latex>
boxit
1 -1.5 [1.5 dup] dctexlabel