diff --git a/code/code_gen/post.py b/code/code_gen/post.py
index eacce7f..a6125dc 100644
--- a/code/code_gen/post.py
+++ b/code/code_gen/post.py
@@ -431,7 +431,13 @@ class Field (FieldBase):
         else:
             self.latex = self.latex_given
 
-        self.exporter = self.attr.get("export")
+        self.exporter = None
+        try:
+            if self.attr["export"]:
+                self.exporter = FieldExporter(self.name, self.attr, self)
+        except KeyError:
+            pass
+
 
         '''
         for a in self.dep:
diff --git a/code/termspecs/termspec.vnsd_fluctuation b/code/termspecs/termspec.vnsd_fluctuation
index 0255baa..25cace5 100644
--- a/code/termspecs/termspec.vnsd_fluctuation
+++ b/code/termspecs/termspec.vnsd_fluctuation
@@ -2,43 +2,42 @@
 
 [u, v, w, y]
 
-c = 1.0 - y
-wrate = rxn_rate(c)
-fsd = sqrt (sqr(ddx(c)) + sqr(ddy(c)) + sqr(ddz(c)))
+c(latex="c") = 1.0 - y
+wrate (latex="\dot{\omega}") = rxn_rate(c)
+fsd (latex="\Sigma_f'")= sqrt (sqr(ddx(c)) + sqr(ddy(c)) + sqr(ddz(c)))
 
-sd = ((d2dx(c) + d2dy(c) + d2dz(c)) * $rod + wrate) / fsd
+lapc(latex="\Delta c") = d2dx(c) + d2dy(c) + d2dz(c)
+sd(latex="S_d") = ($rod * lapc + wrate) / fsd
 
-nx = - ddx(c) / fsd
-ny = - ddy(c) / fsd
-nz = - ddz(c) / fsd
+nx(latex="n_x") = - ddx(c) / fsd
+ny(latex="n_y") = - ddy(c) / fsd
+nz(latex="n_z") = - ddz(c) / fsd
 
 unx = u * nx
 vny = v * ny
 wnz = w * nz
-vn = unx + vny + wnz
+vn(latex="v_n") = unx + vny + wnz
 
-divn = ddx(nx) + ddy(ny) + ddz(nz)
+divn(latex="\nabla \cdot \vec{n}") = ddx(nx) + ddy(ny) + ddz(nz)
 
 divn2 = sqr(divn)
 
 # grad(n) : grad(n)
-gradn_gradn = sqr(ddx(nx)) + sqr(ddy(ny)) + sqr(ddz(nz)) + 2*(ddx(ny)*ddy(nx)) + 2*(ddx(nz)*ddz(nx)) + 2*(ddy(nz)*ddz(ny))
+gradn_gradn(latex="\nabla \vec{n} : \nabla \vec{n}") = sqr(ddx(nx)) + sqr(ddy(ny)) + sqr(ddz(nz)) + 2*(ddx(ny)*ddy(nx)) + 2*(ddx(nz)*ddz(nx)) + 2*(ddy(nz)*ddz(ny))
 
 absk = abs(divn)
 
-lapc = d2dx(c) + d2dy(c) + d2dz(c)
-
 vnsd = vn+sd
 
 divn_nx = divn*nx
 
-gradn_vnsd = ddx(vnsd) * nx + ddy(vnsd) * ny + ddz(vnsd) * nz
+gradn_vnsd (latex="\nabla_{\mathrm{n}}(v_n+S_d)") = ddx(vnsd) * nx + ddy(vnsd) * ny + ddz(vnsd) * nz
 
-gradt_vnsd1 = ddx(vnsd) - nx * gradn_vnsd
+gradt_vnsd1 (latex="\nabla_{\top,x}(v_n+S_d)")= ddx(vnsd) - nx * gradn_vnsd
 
 divn2_dndn = divn2 - gradn_gradn
 
-sign_divn = $dsign(1.0, divn)
+sign_divn(latex="\mathrm{sign}(\nabla \cdot \vec{n})") = $dsign(1.0, divn)
 
 sign_divn2_dndn = sign_divn * divn2_dndn