Fractions 
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We have already seen how to enter some simple fractions. Fractions with complicated numerators or denominators must have the numerator and/or denominator surrounded by brackets. These brackets will not be displayed, they are used as logical brackets so that you clearly indicate the elements that comprise the numerator and denominator.
Examples: is entered as (3x+2)/4 is entered as ((x+1)2(x+2))/(x+1) is entered as x=(b + sr(b24ac))/2a or you can use the qf standard shortcut.
is entered as 1/(1+4x^(3x/2)+1/(2x2+1/2))
The equation technology can be set to shrink nonalgebraic fractions (like the 1/2 in the equation above). This usually produces superior results and is necessary for the display of mixed numerals
