Verified answer

[ ( 28π^4d^3e ) / (-7π^2e^4) ] - [ (16πe^9) / (32πe^3) ] ====> simplification numbers

[ ( 4π^4d^3e ) / (-π^2e^4) ] - [ (πe^9) / (2πe^3) ] ====> simplification π

[ ( -4π^2d^3e ) / (-e^4) ] - [ (e^9) / (2e^3) ] ====> simplification e

[ ( -4π^2d^3 ) / (e^3) ] - [ (e^9) / (2e^3) ] ====> i didn't simplify the second numerator with denominator because it is ready LCD method, now i only need to multiply by 2 as the following:

[ 2 * ( -4π^2d^3 ) / 2 * (e^3) ] - [ (e^9) / (2e^3) ]

[ (-8π^2d^3 ) / 2e^3 ] - [ (e^9) / (2e^3) ]

[ (-8π^2d^3 ) - e^9 ] / [ (2e^3) ]

[ -8π^2d^3 - e^9 ] / [ (2e^3) ]

[ (-1) * (8π^2d^3 + e^9) ] / [ (2e^3) ]

========

please e-mail me if u have a question.