### The Maxima on-line user's manual

Algebra Calculator

#### Rembox

Function: rembox (<expr>, unlabelled)

Function: rembox (<expr>, <label>)

Function: rembox (<expr>) Removes boxes from <expr>.

`rembox (<expr>, unlabelled)` removes all unlabelled boxes from <expr>.

`rembox (<expr>, <label>)` removes only boxes bearing <label>.

`rembox (<expr>)` removes all boxes, labelled and unlabelled.

Boxes are drawn by the `box`, `dpart`, and `lpart` functions.

Examples:

```          (%i1) expr: (a*d - b*c)/h^2 + sin(%pi*x);
a d - b c
(%o1)                sin(%pi x) + ---------
2
h
(%i2) dpart (dpart (expr, 1, 1), 2, 2);
"""""""    a d - b c
(%o2)               sin("%pi x") + ---------
"""""""      """"
" 2"
"h "
""""
(%i3) expr2: lpart (BAR, lpart (FOO, %, 1), 2);
FOO"""""""""""   BAR""""""""
"    """"""" "   "a d - b c"
(%o3)             "sin("%pi x")" + "---------"
"    """"""" "   "  """"   "
""""""""""""""   "  " 2"   "
"  "h "   "
"  """"   "
"""""""""""
(%i4) rembox (expr2, unlabelled);
BAR""""""""
FOO"""""""""   "a d - b c"
(%o4)              "sin(%pi x)" + "---------"
""""""""""""   "    2    "
"   h     "
"""""""""""
(%i5) rembox (expr2, FOO);
BAR""""""""
"""""""    "a d - b c"
(%o5)              sin("%pi x") + "---------"
"""""""    "  """"   "
"  " 2"   "
"  "h "   "
"  """"   "
"""""""""""
(%i6) rembox (expr2, BAR);
FOO"""""""""""
"    """"""" "   a d - b c
(%o6)              "sin("%pi x")" + ---------
"    """"""" "     """"
""""""""""""""     " 2"
"h "
""""
(%i7) rembox (expr2);
a d - b c
(%o7)                sin(%pi x) + ---------
2
h```

```(%o1)                                true
(%i2) ```

? rembox;

Calculate

? rembox;

Calculate