You can use expressions as parameters for some SDA commands,
    such as SEARCH and EXAMINE. To create expressions, use any of the
    following elements:

    o  Numerals

    o  Radix operators

    o  Arithmetic and logical operators

    o  Precedence operators

    o  Symbols

    Numerals are one possible component of an expression. The
    following paragraphs describe the use of the other components.

    Radix operators determine which numeric base SDA uses to evaluate
    expressions. You can use one of the three radix operators to
    specify the radix of the numeric expression that follows the
    operator:

    o  ^X (hexadecimal)

    o  ^O (octal)

    o  ^D (decimal)

    The default radix is hexadecimal. SDA displays hexadecimal
    numbers with leading zeros and decimal numbers with leading
    spaces.

    There are two types of arithmetic and logical operators:

    o  Unary operators affect the value of the expression that
       follows them.

    o  Binary operators combine the operands that precede and follow
       them.

    In evaluating expressions containing binary operators, SDA
    performs logical AND, OR, and XOR operations, and multiplication,
    division, and arithmetic shifting before addition and
    subtraction. Note that the SDA arithmetic operators perform
    integer arithmetic on 64-bit operands.