Question 54083
{{{(x/3+3/4)(3x/4-3/5)}}}
You need to distribute x/3 by everything in the second parenthesis and then multiply 3/4 by everything in the second parenthesis and then combine your like terms.
{{{(x*3x)/(3*4)+(x*-3)/(3*5)+(3*3x)/(4*4)+(3*-3)/(4*5)}}}
{{{(3x^2)/12+(x(-1)(cross(3)))/((cross(3))5)+(3/4)(3x/4)+(3/4)(-3/5))}}}
{{{3x^2/12-x/5+9x/16-9/20}}}
{{{3x^2/12+(-1/5+9/16)x-9/20}}}
{{{3x^2/12+(-16/80+45/80)x-9/20}}}
{{{highlight(3x^2/12+29x/80-9/20)}}}
Happy calculating!!!
I hope this is better.  If not let me know.