You can use brackets and newlines in various ways to create order in your equations.
Parentheses may be used to indicate grouping as in ordinary mathematical notation, e.g.:
u = sin(time*f*2*3.1415 + (a + b)/c );
If a lot of parenthesis are used, it may be hard to see the grouping. You can always put your mouse pointer next to a parenthesis and have the group highlighted.
Square Brackets are used to indicated matrix sizes and matrix elements:
integer p[6,6] = [1,0,0,0,0,0;0,2,0,0,0,0;0,0,2,0,0,0;0,0,0,5,0,0;0,1,0,0,5,0;0,1,0,0,0,6];
v = p[4:6,6];
Newlines, tabs and white spaces can be used to make your equations more readable. E.g for the parameter example from above we could also write:
integer p[6,6]; = [