Examples of Physics Notation with physPad®
The following examples illustrate entry of some common expressions.
Expression 
Do this 
To display this 

An expression with numbers and subscripted variables 

$\frac{1}{2}{m}_{2}+4{m}_{3}$ 
Set notation with fractions 

$\left(\frac{1}{9},\frac{2}{7},\frac{3}{5}\right)$ 
A square root 

$\sqrt{gh}$ 
A cube root 

$\sqrt[3]{{m}_{1}{m}_{2}{m}_{3}}$ 
An expression involving Euler's number 

${\mathit{e}}^{2}$ 
The natural logarithm of an absolute value 

$\mathrm{ln}\left(\leftx\right\right)$ 
An inverse sine 
Although you could type arcsin or use the tool button, this example illustrates how you can enter certain functions using the keyboard alone. 
${\mathrm{sin}}^{1}\left(x\right)$ 
An expression involving hbar (ħ) 

$3{\u0127}^{2}$ 
A vector in hatted ijk form 

$5\widehat{\u0131}+24\widehat{\u0237}+4\widehat{k}$ 
A vector in vector bracket form 

$\u27e812,15,22\u27e9$ 
A vector in bold ijk form 

$5\mathbf{i}+24\mathbf{j}+4\mathbf{k}$ 