Adobe FRAMEMAKER 6.0 Manual page 208

Sums, products, and integrals have three display formats. The formats are the same for all of these
operators; as an example, the following table shows the display formats for an integral with three operands.
Example
b
ò
x
a
b
ò
x
a
b
ò
x
a
Expressions with optional operands
Some expressions have optional operands. In these expressions, the optional operands follow the primary
operand. The following table contains an example of each expression with optional operands.
Example
x
1
2
log x
log x
x
x
x
x
d
x d
x
d
d x
x
x
x
x
x
x
MathFullForm statement
<MathFullForm
`int[char[x],char[a],char[b]]'>
<MathFullForm
`int[(*i1i*)char[x],char[a],char[b]]'>
<MathFullForm
`int[(*i2i*)char[x],char[a],char[b]]'>
MathFullForm statement
<MathFullForm `grad[char[x]]'>
<MathFullForm `grad[num[1,"1"],num[2,"2"]]'>
<MathFullForm `log[char[x]]'>
<MathFullForm `log[char[x],char[x]]'>
<MathFullForm `oppartial[char[x]]'>
<MathFullForm `oppartial[char[x],char[x]]'>
<MathFullForm `optotal[char[x]]'>
<MathFullForm `optotal[char[x],char[x]]' >
<MathFullForm `sqrt[char[x]]'>
<MathFullForm `sqrt[char[x],char[x]]'>
<MathFullForm `substitution[char[x]]'>
<MathFullForm `substitution[char[x],char[x]]'>
ADOBE FRAMEMAKER 6.0 208
MIF Equation Statements