Calculations
The debugger allows usage of basic math operations, just type an expression in the command window and the result will be displayed in the console. Apart from calculations, it allows quick variable changes using a C-like syntax.

Operators
You can use the following operators in your expression. They are processed in the following order (source):

1:parentheses/brackets: (1+2), [1+6] have priority over other operations.

2:unary minus/binary not/logical not: -1 (negative 1), ~1 (binary not of 1), !0 (logical not of 0).

3:multiplication/division: 2*3 (regular multiplication), 2`3 (gets high part of the multiplication), 6/3 (regular division), 5%3 (modulo/remainder of the division).

4:addition/subtraction: 1+3 (addition), 5-2 (subtraction).

5:left/right shift: 1<<2 (shift left, shl for unsigned, sal for signed), 10>>1 (shift right, shl for unsigned, sal for signed).

6:smaller (equal)/bigger (equal): 4<10, 3>6, 1<=2, 6>=7 (resolves to 1 if true, 0 if false).

7:equal/not equal: 1==1, 2!=6 (resolves to 1 if true, 0 if false).

8:binary and: 12&2 (regular binary and).

9:binary xor: 2^1 (regular binary xor).

10:binary or: 2|8 (regular binary or).

11:logical and: 0&&3 (resolves to 1 if true, 0 if false).

12:logical or: 0||3 (resolves to 1 if true, 0 if false).

Quick-Assigning
Changing memory, a variable, register or flag can be easily done using a C-like syntax:

a?= b: '?' can be any non-logical operator. 'a' can be any register, flag, variable or memory location. 'b' can be anything that is recognized as an expression.

a++/a--: 'a' can be any register, flag, variable or memory location.