The ASCII Math Notation is used to type fast math sentences using the keyboard. It is also used in several programming languages to instruct computers to do operations.

**This is a summary of some expressions:**

**How to write the square symbol . Two ways.**

- to represent a
^{2}we write a^2 using the caret symbol (^) to express "raised to the power of" or "exponent." - Also you can use these keys combinations: "Alt"+"253" to get: ² (Just hold "alt" down and type the numbers in on the right side of the keyboard (num pad) then let go of the buttons and the character will appear.)

**How to type Square Roots **

- for "square root of 6" we write sqrt(6) to express √6

- Also use this combination: "Alt"+"251" to get: √ which is the square root symbol. Use parentheses to write complete expressions. Ex: x = [-b±√(b²-4ac)]/(2a)

**How to represent multiplication. Diferent ways.**

- 5 x 5 is best written as (5)(5) or 5*5. Use parentheses or the asterisk (*) to represent multiplication.

We avoid the use of "x" as a multiplication symbol. We use "x" for "unknowns" or variables when solving problems. Example: 5 + x = 8

**How to type fractions**

- ? can be written as 5/(2x) * Attention! if you write 5/2x, it is an ambiguous expression, because 5/2x could be interpreted as well as (5/2)x. Use parentheses to avoid ambiguity!

**How to write Exponentials**

- will be then as 5^2 + x^(5y)

**How to type the square symbol.**

- is written as (pi)r^2 or pi*r^2 . The symbol pi (π) can be rendered using "Alt" (227)

**How to write inequalities **

- means "x is less or equal to zero" it is written as x < = 0. The symbol ≤ is rendered using "Alt"(243)

**How to write logarithms. **

- is written by us as log_{10}120 or log_(10)120

**How to write matrices?**

Just use the brackets [ ] keys found right of the P key in your keyboard.

**Examples: **

**1. To write a 1×3 matrix** with elements 4,5,8 use [4 5 8]

make sure to leave at least **one blank space between elements** for aesthetics.

**2. To write a 3×1 matrix** with elements 7 -2 1 use

[7]

[-2]

[1]

**3. To write a 3×3 matrix** see this example:

[2 5 1]

[3 -1 6]

[1 6 7]

**Other important symbols you can write just by using the combination: "Alt and numbers"**

(Just hold "Alt" down and type the numbers in on the right side of the keyboard (num pad) then let go of the buttons and the character will appear.)

Alt + 7. • Black dot

Alt + 28. 90º degree angle

Alt + 167. º The degrees or degree symbol

Alt + 171. ½ One half symbol

Alt + 172. ¼ One quarter symbol O

Alt + 225. ß The Greek letter "Betha"

Alt + 241. ± Plus and minus (Plus or minus) sign, Plus-minus Symbol

Alt + 246. ÷ Divide or Division Symbol

Alt + 248. ° Degree or degrees code

Alt + 253. ² Squared symbol, superscript 2 via ascii

More symbols in my google website

More about math writting at: http://mathforum.org/typesetting/ascii.guidelines.html

Another good document: http://www.integreat.ca/OL/docs/WritingMathPlainText.pdf