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diff --git a/man/blind-arithm.1 b/man/blind-arithm.1
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@@ -50,13 +50,18 @@ is the value of the right-hand operand.
.TP
.B log
Calculate the logarithm of the left-hand operand
-and divid it by the logarithm of the rigth-hand operand.
+and divide it by the logarithm of the rigth-hand operand.
.TP
.B min
Select the lowest operand.
.TP
.B max
Select the highest operand.
+.TP
+.B abs
+Calculate the the sum of absolute value of the left-hand
+operand subtracted by the right-hand operand, and the
+right-hand operand
.SH OPTIONS
.TP
.B -a