Trinity Moodle

• Synatx: \left[...\right]
• Ex.: $$$\left[a,b\right]$$$ gives $$\left[a,b\right]$$

• General syntax for symbols with a kind of lower and upper limits:

\symbolname_{<em>lowerexpression</em>}^{<em>upperexpression</em>}

• In general, there are two ways how these lower and upper expressions can be placed: centered below and above the symbol or in a subscript / superscript manner. In the first case the symbol name is preceded by the word "big", in the second there is no prefix.
• Syntax for summation symbol:

$$$\bigsum_{i=k}^{n}$$$   gives  

$$\bigsum_{i=k}^{n}$$

and

$$$\sum_{i=k}^{n}$$$   gives 

$$\sum_{i=k}^{n}$$

• Use font size commands for a nicer picture:

$$$\LARGE\bigsum_{\small{i=1}}^{\small{n}}$$$   gives  

$$\LARGE\bigsum_{\small{i=1}}^{\small{n}}$$

and

$$$\large\sum_{\small{i=1}}^{\small{n}}$$$   gives 

$$\large\sum_{\small{i=1}}^{\small{n}}$$