(-x)^7/(-x)^3 a^m+2/a^m-1 (a^3)^5/(-a^2)^4/a^2 (-1/2)^3/(-1/2)^5 (-3)^0/(-3)^-1 (a^2*a^4)^3/(-a^3)^2/a
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(-x)^7/(-x)^3 a^m+2/a^m-1 (a^3)^5/(-a^2)^4/a^2 (-1/2)^3/(-1/2)^5 (-3)^0/(-3)^-1 (a^2*a^4)^3/(-a^3)^2/a
(-x)^7/(-x)^3 a^m+2/a^m-1 (a^3)^5/(-a^2)^4/a^2 (-1/2)^3/(-1/2)^5 (-3)^0/(-3)^-1 (a^2*a^4)^3/(-a^3)^2/a
(-x)^7/(-x)^3 a^m+2/a^m-1 (a^3)^5/(-a^2)^4/a^2 (-1/2)^3/(-1/2)^5 (-3)^0/(-3)^-1 (a^2*a^4)^3/(-a^3)^2/a
(-x)^7/(-x)^3=(-x)^(7-3)=(-x)^4 =x^4
a^m+2/a^m-1=[1/(a^m)+1]^2-2
(a^3)^5/(-a^2)^4/a^2=a^15 / [a^(8+2)]=a^15/a^10=a^5
(-1/2)^3/(-1/2)^5=1/[(-1/2)^2]=1/(1/4)=4
(-3)^0/(-3)^-1=1/(-1/3)=-3
(a^2*a^4)^3/(-a^3)^2/a=a^[(2+4)x3]/a^6/a=a^(12+1)=a^13
(-x)^7/(-x)^3=-x^7/-x^3=x^(7-3)=-x^4,(a^3)^5/(-a^2)^4/a^2 =a^3*5/a^2*4/a^2=a^15+2/a^8=a^17/a^8=a^9
-1/2^3/-1/2^5=-1/2^3-5=-1/2^-2=-4,(-3)^0/(-3)^-1=1/-1/3=-3,
(a^2*a^4)^3/(-a^3)^2/a=(a^2+4)^3/a^3*2/a=a^6*3*a/a^6=a^18+1/a^6=a^19/a^6=a^19-6=a^13