If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( v )
v+6 = 0
(v+1)*(v+6) = 0
v+6 = 0
v+6 = 0
v+6 = 0 // - 6
v = -6
(v+1)*(v+6) = 0
(v+1)*(v+6) = 0
( v+1 )
v+1 = 0 // - 1
v = -1
( v+6 )
v+6 = 0 // - 6
v = -6
v in (-oo:-6) U (-6:-1) U (-1:+oo)
4/(v+6)+5 = 6/((v+1)*(v+6)) // - 6/((v+1)*(v+6))
4/(v+6)-(6/((v+1)*(v+6)))+5 = 0
4/(v+6)-6*(v+1)^-1*(v+6)^-1+5 = 0
4/(v+6)-6/((v+1)*(v+6))+5 = 0
(4*(v+1))/((v+6)*(v+1))-6/((v+6)*(v+1))+(5*(v+6)*(v+1))/((v+6)*(v+1)) = 0
4*(v+1)+5*(v+6)*(v+1)-6 = 0
5*v^2+4*v+35*v-2+30 = 0
5*v^2+39*v+28 = 0
5*v^2+39*v+28 = 0
5*v^2+39*v+28 = 0
DELTA = 39^2-(4*5*28)
DELTA = 961
DELTA > 0
v = (961^(1/2)-39)/(2*5) or v = (-961^(1/2)-39)/(2*5)
v = -4/5 or v = -7
(v+7)*(v+4/5) = 0
((v+7)*(v+4/5))/((v+6)*(v+1)) = 0
((v+7)*(v+4/5))/((v+6)*(v+1)) = 0 // * (v+6)*(v+1)
(v+7)*(v+4/5) = 0
( v+4/5 )
v+4/5 = 0 // - 4/5
v = -4/5
( v+7 )
v+7 = 0 // - 7
v = -7
v in { -4/5, -7 }
| 2.8x-3(2x-1)=2.8-3.19x | | 12*(13/4x+5/8)=-61/2 | | 6-(5/(y+2))=((-4)/(y-1)) | | 18x*12=4x*60 | | 0=-6v^2-15v-12 | | 2*3x+1=3 | | 2=2x/(1.15-x)(1.15-x) | | 2x*3+1=3 | | 12-8=10x+4 | | z^2+1=0 | | 12x-3=x-186*72 | | 4x=113 | | C(Q)=30+3Q | | 4x=1113 | | 5x+95*6=10 | | 14=10(1+r)4 | | 5x+23=74x-37 | | 0=2y^2+17y+30 | | (2/3)h-9=6-(2/3)h | | 228-7x=29x+20 | | 12b-3b-6b-2b= | | 7(y+9)=-6y-15 | | 5x*3=17 | | s+45=1282-2s | | z^2-(5+2i)z+(1+i)=0 | | z^2-(5+2)z+(1+i)=0 | | s^2+0.001s+250=0 | | c-50=.8(c-100) | | s^2+1ms+250=0 | | 0.8(c-100)=450 | | s^2+10s+25=0 | | x+7x=72 |