If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
x^2-16 = 0
x^2+5*x+4 = 0
x^2-16 = 0
x^2-16 = 0
1*x^2 = 16 // : 1
x^2 = 16
x^2 = 16 // ^ 1/2
abs(x) = 4
x = 4 or x = -4
x^2+5*x+4 = 0
x^2+5*x+4 = 0
x^2+5*x+4 = 0
DELTA = 5^2-(1*4*4)
DELTA = 9
DELTA > 0
x = (9^(1/2)-5)/(1*2) or x = (-9^(1/2)-5)/(1*2)
x = -1 or x = -4
x in (-oo:-4) U (-4:-1) U (-1:4) U (4:+oo)
x/(x^2-16)-(4/(x^2+5*x+4)) = 0
x/(x^2-16)-4*(x^2+5*x+4)^-1 = 0
x/(x^2-16)-4/(x^2+5*x+4) = 0
x^2+5*x+4 = 0
x^2+5*x+4 = 0
x^2+5*x+4 = 0
DELTA = 5^2-(1*4*4)
DELTA = 9
DELTA > 0
x = (9^(1/2)-5)/(1*2) or x = (-9^(1/2)-5)/(1*2)
x = -1 or x = -4
(x+4)*(x+1) = 0
x/(x^2-16)-4/((x+4)*(x+1)) = 0
(x*(x+4)*(x+1))/((x^2-16)*(x+4)*(x+1))+(-4*(x^2-16))/((x^2-16)*(x+4)*(x+1)) = 0
x*(x+4)*(x+1)-4*(x^2-16) = 0
x^3+x^2+4*x+64 = 0
x^3+x^2+4*x+64 = 0
x^3+x^2+4*x+64 = 0
{ 1, -1, 2, -2, 4, -4, 8, -8, 16, -16, 32, -32, 64, -64 }
1
x = 1
x^3+x^2+4*x+64 = 70
1
-1
x = -1
x^3+x^2+4*x+64 = 60
-1
2
x = 2
x^3+x^2+4*x+64 = 84
2
-2
x = -2
x^3+x^2+4*x+64 = 52
-2
4
x = 4
x^3+x^2+4*x+64 = 160
4
-4
x = -4
x^3+x^2+4*x+64 = 0
-4
x+4
x^2-3*x+16
x^3+x^2+4*x+64
x+4
-x^3-4*x^2
4*x-3*x^2+64
3*x^2+12*x
16*x+64
-16*x-64
0
x^2-3*x+16 = 0
DELTA = (-3)^2-(1*4*16)
DELTA = -55
DELTA < 0
x in { -4}
x+4 = 0
(x+4)/((x^2-16)*(x+4)*(x+1)) = 0
(x+4)/((x^2-16)*(x+4)*(x+1)) = 0 // * (x^2-16)*(x+4)*(x+1)
x+4 = 0
x+4 = 0 // - 4
x = -4
x in { -4}
x belongs to the empty set
| a^2+4=53 | | x=3(y-1)+2 | | 7(-3+5(8-2))= | | v^2=50 | | 25x-10x=25+5x | | 7x-7=2(3x+4)-1 | | t^2=14-5t | | 4n^2-8n-45=0 | | 18+42p=15+18p | | 3+4x=11+x | | (4x-8)/(x^2-9)=0 | | 11-42=7+44 | | 3x+4=21+x | | (4x^8+5x^5-7)-(6c^5+5x^8-7)= | | 2x+34=12x-74 | | 75+0.1x=400 | | f(1)=25+5+5 | | 200+0.05x=75+0.1x | | h(t)=-16t^2+28t+s | | 12=-d+17 | | m^2-18=-3m | | f(1)=1-1+5 | | 2x+6=4/2x+1 | | 2n+4=14 | | h=-16t^2+28t+s | | 3x+1=13-1 | | 9x-8(3x+2)=6 | | 14=.01125x^2+.1825x+1.75 | | (x-3)/(x+5)=0 | | (-x+3)=9 | | 5x+6x-3x=5 | | 2(n+2)=5-5 |