diff --git a/README.md b/README.md
index 1c1ee56..10702bc 100644
--- a/README.md
+++ b/README.md
@@ -134,7 +134,7 @@ evolutionary tree for a given locus). The data for each locus is stored as one
alignment in its own NEXUS file. Taxa names in each alignment have to be unique,
but duplicates across alignments are fine.
-To load a NEXUS format alignment, click the button with the plus symbol ($+$) in
+To load a NEXUS format alignment, click the button with the plus symbol (+) in
the lower left corner of the main **Partitions** tab. For this tutorial,
navigate to the **examples/nexus** subfolder inside the **beast**
application folder, and select all of the first seven NEXUS files. They should
@@ -197,7 +197,7 @@ Ploidy should be based on the mode of inheritance for each gene. By convention,
nuclear genes in diploids are given a ploidy of 2.0. Because mitochondrial and Y
chromosome genes are haploid even in otherwise diploid organisms, and also
inherited only through the mother or the father respectively, their effective
-population size $N_e$ is only one quarter that of nuclear genes. Therefore if
+population size Ne is only one quarter that of nuclear genes. Therefore if
nuclear gene ploidy is set to 2.0, mitochondrial or Y chromosome gene ploidy
should be set to 0.5. In this analysis all genes are from nuclear loci and their
ploidy should be left at the default value of 2.0.
@@ -284,7 +284,7 @@ differences in substitution rates, so we should constrain the per-species branch
rates to a reasonable range of values. Click the button next to
_branchRates.Species_ to define this range. Change _Lower_ to 0.1 and
_Upper_ to 10.0, which means that the fastest branch rate can not be more than
-$100\times$ that of the slowest branch rate.
+100 times that of the slowest branch rate.