diff --git a/fc-lang/und_zmth.orth b/fc-lang/und_zmth.orth
index ff92ba7..227afee 100644
--- a/fc-lang/und_zmth.orth
+++ b/fc-lang/und_zmth.orth
@@ -90,31 +90,20 @@
 203B	#	N 	# ※	REFERENCE MARK
 2044	#	X 	# ⁄	FRACTION SLASH
 2057	#	N 	# ⁗	QUADRUPLE PRIME
-20D0..20D2	#	D 	# ⃐..⃒	COMBINING LEFT HARPOON ABOVE..LONG VERTICAL LINE OVERLAY
 20E1	#	D 	# ⃡	COMBINING LEFT RIGHT ARROW ABOVE
 2102	#	A 	# ℂ	DOUBLE-STRUCK CAPITAL C
-2107	#	N 	# ℇ	EULER CONSTANT
 210E..210F	#	N 	# ℎ..ℏ	PLANCK CONSTANT.. OVER TWO PI
 2110..2113	#	A 	# ℐ..ℓ	SCRIPT CAPITAL I..SMALL L
 2115	#	A 	# ℕ	DOUBLE-STRUCK CAPITAL N
 2118..211D	#	A 	# ℘..ℝ	SCRIPT CAPITAL P..DOUBLE-STRUCK CAPITAL R
 2124	#	A 	# ℤ	DOUBLE-STRUCK CAPITAL Z
 2126..2127	#	N 	# Ω..℧	OHM SIGN..INVERTED OHM SIGN
-2128	#	A 	# ℨ	BLACK-LETTER CAPITAL Z
-212B..212D	#	A 	# Å..ℭ	ANGSTROM SIGN..BLACK-LETTER CAPITAL C
-213C..213D	#	A 	# ℼ..ℽ	DOUBLE-STRUCK SMALL PI..GAMMA
-213E	#	N 	# ℾ	DOUBLE-STRUCK CAPITAL GAMMA
-213F	#	A 	# ℿ	DOUBLE-STRUCK CAPITAL PI
-2140	#	L 	# ⅀	DOUBLE-STRUCK N-ARY SUMMATION
-21B0..21B3	#	R 	# ↰..↳	UPWARDS ARROW WITH TIP LEFTWARDS..DOWNWARDS ARROW WITH TIP RIGHTWARDS
-21B6..21B7	#	R 	# ↶..↷	ANTICLOCKWISE TOP SEMICIRCLE ARROW..CLOCKWISE TOP SEMICIRCLE ARROW
 2200..2201	#	U 	# ∀..∁	FOR ALL..COMPLEMENT
 2202	#	N 	# ∂	PARTIAL DIFFERENTIAL
 2203..2204	#	U 	# ∃..∄	THERE EXISTS..DOES NOT EXIST
 2205	#	N 	# ∅	EMPTY SET
 2206..2207	#	U 	# ∆..∇	INCREMENT..NABLA
 2208..220D	#	R 	# ∈..∍	ELEMENT OF..SMALL CONTAINS AS MEMBER
-220E	#	N 	# ∎	END OF PROOF
 220F..2211	#	L 	# ∏..∑	N-ARY PRODUCT..SUMMATION
 2212..2213	#	V 	# −..∓	MINUS SIGN..MINUS-OR-PLUS SIGN
 2214..2219	#	B 	# ∔..∙	DOT PLUS..BULLET OPERATOR
@@ -122,7 +111,6 @@
 221E..2222	#	N 	# ∞..∢	INFINITY..SPHERICAL ANGLE
 2223..2226	#	R 	# ∣..∦	DIVIDES..NOT PARALLEL TO
 2227..222A	#	B 	# ∧..∪	LOGICAL AND..UNION
-222B..2233	#	L 	# ∫..∳	INTEGRAL..ANTICLOCKWISE CONTOUR INTEGRAL
 2234..2235	#	N 	# ∴..∵	THEREFORE..BECAUSE
 2236..2237	#	R 	# ∶..∷	RATIO..PROPORTION
 2238	#	B 	# ∸	DOT MINUS
@@ -130,29 +118,20 @@
 223E	#	B 	# ∾	INVERTED LAZY S
 223F	#	N 	# ∿	SINE WAVE
 2240	#	B 	# ≀	WREATH PRODUCT
-2241..228B	#	R 	# ≁..⊋	NOT TILDE..SUPERSET OF WITH NOT EQUAL TO
 228C..228E	#	B 	# ⊌..⊎	MULTISET.. UNION
 228F..2292	#	R 	# ⊏..⊒	SQUARE IMAGE OF..ORIGINAL OF OR EQUAL TO
 2293..22A1	#	B 	# ⊓..⊡	SQUARE CAP..SQUARED DOT OPERATOR
 22A2..22A3	#	R 	# ⊢..⊣	RIGHT TACK..LEFT TACK
 22A4..22A5	#	N 	# ⊤..⊥	DOWN TACK..UP TACK
-22B9..22BD	#	B 	# ⊹..⊽	HERMITIAN CONJUGATE MATRIX..NOR
-22BE..22BF	#	N 	# ⊾..⊿	RIGHT ANGLE WITH ARC..TRIANGLE
 22C0..22C3	#	L 	# ⋀..⋃	N-ARY LOGICAL AND..UNION
-22C4..22C7	#	B 	# ⋄..⋇	DIAMOND OPERATOR..DIVISION TIMES
 22C8	#	R 	# ⋈	BOWTIE
-22C9..22CC	#	B 	# ⋉..⋌	LEFT NORMAL FACTOR SEMIDIRECT PRODUCT..RIGHT SEMIDIRECT PRODUCT
 22CD	#	R 	# ⋍	REVERSED TILDE EQUALS
 22CE..22CF	#	B 	# ⋎..⋏	CURLY LOGICAL OR..AND
-22D0..22D1	#	R 	# ⋐..⋑	DOUBLE SUBSET..SUPERSET
-22D2..22D3	#	B 	# ⋒..⋓	DOUBLE INTERSECTION..UNION
 2300	#	N 	# ⌀	DIAMETER SIGN
-2305..2306	#	B 	# ⌅..⌆	PROJECTIVE..PERSPECTIVE
 2308	#	O 	# ⌈	LEFT CEILING
 2309	#	C 	# ⌉	RIGHT CEILING
 230A	#	O 	# ⌊	LEFT FLOOR
 230B	#	C 	# ⌋	RIGHT FLOOR
-2319	#	N 	# ⌙	TURNED NOT SIGN
 231C	#	O 	# ⌜	TOP LEFT CORNER
 231D	#	C 	# ⌝	TOP RIGHT CORNER
 231E	#	O 	# ⌞	BOTTOM LEFT CORNER
@@ -160,31 +139,20 @@
 2322..2323	#	R 	# ⌢..⌣	FROWN..SMILE
 25A0..25A1	#	N 	# ■..□	BLACK SQUARE..WHITE SQUARE
 25E6	#	B 	# ◦	WHITE BULLET
-25EF	#	N 	# ◯	LARGE CIRCLE
 2660..2667	#	N 	# ♠..♧	BLACK SPADE SUIT..WHITE CLUB SUIT
 266D..266F	#	N 	# ♭..♯	MUSIC FLAT SIGN..SHARP SIGN
-2713	#	N 	# ✓	CHECK MARK
-2720	#	N 	# ✠	MALTESE CROSS
 27E6	#	O 	# ⟦	MATHEMATICAL LEFT WHITE SQUARE BRACKET
 27E7	#	C 	# ⟧	MATHEMATICAL RIGHT WHITE SQUARE BRACKET
 27E8	#	O 	# ⟨	MATHEMATICAL LEFT ANGLE BRACKET
 27E9	#	C 	# ⟩	MATHEMATICAL RIGHT ANGLE BRACKET
-27EA	#	O 	# ⟪	MATHEMATICAL LEFT DOUBLE ANGLE BRACKET
-27EB	#	C 	# ⟫	MATHEMATICAL RIGHT DOUBLE ANGLE BRACKET
 1D400..1D454	#	A 	# 𝐀..𝑔	MATHEMATICAL BOLD CAPITAL A..ITALIC SMALL G
 1D456..1D49C	#	A 	# 𝑖..𝒜	MATHEMATICAL ITALIC SMALL I..SCRIPT CAPITAL A
 1D49E..1D49F	#	A 	# 𝒞..𝒟	MATHEMATICAL SCRIPT CAPITAL C..D
 1D4A2	#	A 	# 𝒢	MATHEMATICAL SCRIPT CAPITAL G
 1D4A5..1D4A6	#	A 	# 𝒥..𝒦	MATHEMATICAL SCRIPT CAPITAL J..K
 1D4A9..1D4AC	#	A 	# 𝒩..𝒬	MATHEMATICAL SCRIPT CAPITAL N..Q
-1D507..1D50A	#	A 	# 𝔇..𝔊	MATHEMATICAL FRAKTUR CAPITAL D..G
-1D50D..1D514	#	A 	# 𝔍..𝔔	MATHEMATICAL FRAKTUR CAPITAL J..Q
-1D516..1D51C	#	A 	# 𝔖..𝔜	MATHEMATICAL FRAKTUR CAPITAL S..Y
-1D51E..1D539	#	A 	# 𝔞..𝔹	MATHEMATICAL FRAKTUR SMALL A..DOUBLE-STRUCK CAPITAL B
 1D53B..1D53E	#	A 	# 𝔻..𝔾	MATHEMATICAL DOUBLE-STRUCK CAPITAL D..G
 1D540..1D544	#	A 	# 𝕀..𝕄	MATHEMATICAL DOUBLE-STRUCK CAPITAL I..M
 1D546	#	A 	# 𝕆	MATHEMATICAL DOUBLE-STRUCK CAPITAL O
 1D54A..1D550	#	A 	# 𝕊..𝕐	MATHEMATICAL DOUBLE-STRUCK CAPITAL S..Y
-1D552..1D6A5	#	A 	# 𝕒..𝚥	MATHEMATICAL DOUBLE-STRUCK SMALL A..ITALIC SMALL DOTLESS J
 1D6A4..1D6A5	#	A 	# 𝚤..𝚥	MATHEMATICAL ITALIC SMALL DOTLESS I..J
-1D7CE..1D7FF	#	N 	# 𝟎..𝟿	MATHEMATICAL BOLD DIGIT ZERO..MONOSPACE DIGIT NINE