Question 945193

{{{(a^2-2a-3)/(a^2-9a+18)-(a^2-5a-6)/(a^2+9a+8 )}}}


{{{(a^2+a-3a-3)/(a^2-3a-6a+18) -(a^2+a-6a-6)/(a^2+a+8a+8 )}}}


{{{((a^2+a)-(3a+3))/((a^2-3a)-(6a-18)) - ((a^2+a)-(6a+6))/((a^2+a)+(8a+8) )}}}


{{{(a(a+1)-3(a+1))/(a(a-3)-6(a-3)) - (a(a+1)-6(a+1))/(a(a+1)+8(a+1) )}}}


{{{((a+1)cross( (a-3)))/(cross((a-3)) (a-6))-((a-6)cross((a+1)))/(cross((a+1))(a+8) )}}}


{{{(a+1)/(a-6)-(a-6)/(a+8) }}}


{{{((a+1)(a+8))/((a-6)(a+8))-((a-6)(a-6))/((a+8)(a-6))}}}


{{{((a+1)(a+8)-(a-6)(a-6))/((a+8) (a-6))}}}


{{{((a^2+9a+8)-(a^2-12a+36))/((a+8)(a-6))}}}


{{{(cross(a^2)+9a+8-cross(a^2)+12a-36)/((a+8)(a-6))}}}


{{{(21a-28)/((a+8)(a-6))}}}


{{{7(3a-4)/((a+8)(a-6))}}}