diff --git a/bedstead.c b/bedstead.c
index c56fed8..e82acbc 100644
--- a/bedstead.c
+++ b/bedstead.c
@@ -1358,6 +1358,9 @@ static struct glyph {
  {{000,000,000,037,000,000,000,000,000}, 0x2212, "minus" },
  {{037,000,004,004,037,004,004,000,000}, U(2213) }, /* minusplus */
  {{004,000,004,004,037,004,004,000,000}, U(2214) }, /* dot plus */
+ {{000,001,002,004,010,020,000,000,000}, U(2215) }, /* division slash */
+ {{000,020,010,004,002,001,000,000,000}, U(2216) }, /* set minus */
+ {{004,025,016,004,016,025,004,000,000}, 0x2217, "asteriskmath" },
  {{000,000,004,012,012,004,000,000,000}, U(2218) }, /* ring operator */
  {{000,000,004,016,004,000,000,000,000}, U(2219) }, /* bulletoperator */
  {{007,004,004,004,024,014,004,000,000}, 0x221a, "radical" },
@@ -1376,6 +1379,7 @@ static struct glyph {
  {{002,005,004,016,025,016,004,024,010}, U(222E) }, /* contour integral */
  {{000,004,000,000,000,021,000,000,000}, 0x2234, "therefore" },
  {{000,021,000,000,000,004,000,000,000}, U(2235) }, /* because */
+ {{000,004,000,000,000,004,000,000,000}, U(2236) }, /* ratio */
  {{000,004,000,037,000,000,000,000,000}, U(2238) }, /* dot minus */
  {{000,021,000,037,000,021,000,000,000}, U(223A) }, /* geometric proportion */
  {{000,000,010,025,002,000,000,000,000}, 0x223c, "similar" },
@@ -1432,6 +1436,7 @@ static struct glyph {
  {{016,021,021,021,021,021,021,021,021}, U(22C2) }, /* n-ary intersection */
  {{021,021,021,021,021,021,021,021,016}, U(22C3) }, /* n-ary union */
  {{000,004,012,021,012,004,000,000,000}, U(22C4) }, /* diamond operator */
+ {{000,000,000,004,000,000,000,000,000}, U(22C5) }, /* dot operator */
  {{000,020,010,004,012,021,000,000,000}, U(22CB) }, /* left semidirect prod */
  {{000,001,002,004,012,021,000,000,000}, U(22CC) }, /* right semidirect prod */
  {{000,002,025,010,000,037,000,000,000}, U(22CD) }, /* reversed tilde equals */
@@ -1740,6 +1745,7 @@ static struct glyph {
  {{000,016,037,037,037,016,000,000,000}, 0x25cf, "H18533" },
  {{037,037,021,021,021,037,037,000,000}, 0x25d8, "invbullet" },
  {{037,021,004,016,004,021,037,000,000}, 0x25d9, "invcircle" },
+ {{000,000,016,012,016,000,000,000,000}, 0x25e6, "openbullet" },
  {{000,037,025,025,025,037,000,000,000}, U(25EB) }, /* squared vertical line */
  {{000,037,025,035,021,037,000,000,000}, U(25F0) }, /* square upper left quad */
  {{000,037,021,035,025,037,000,000,000}, U(25F1) }, /* square lower left quad */