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^2-4 = 0
x^2-4 = 0
x^2-4 = 0
1*x^2 = 4 // : 1
x^2 = 4
x^2 = 4 // ^ 1/2
abs(x) = 2
x = 2 or x = -2
x in (-oo:-2) U (-2:2) U (2:+oo)
0 = (-3*x^7)/(x^2-4) // - (-3*x^7)/(x^2-4)
0-((-3*x^7)/(x^2-4)) = 0
3*x^7*(x^2-4)^-1 = 0
(3*x^7)/(x^2-4) = 0
3*x^7 = 0 // : 3
x^7 = 0
x = 0
x = 0
| 1x-6y=12 | | (14*x^2+7*x)+9*x^2= | | 7n-(-12)=61 | | (100+4z)=20 | | n^2+7n=450 | | B-50=101 | | 5(2+4x)=42 | | (8x-6)(2x+3)=0 | | -2+2a^3=0 | | 2(5x-3)=4(3X+1) | | 7y+6=-8+4y | | (2x+4)+58=180 | | (9x-7)=(7x+15) | | 42-12r=-r-2 | | 22y+4x=180 | | -3(X+5)=2(U+3) | | P=2(30)+2(28) | | 2y=36-4y | | -5n(2n-1)=0 | | -5x^2+11x-13=0 | | (x/3+7+3x+5)/2=2x-4 | | -5n+4n=-6 | | 7y+6=8+4y | | .14x+0.07(7000-x)=581 | | -10+7x= | | -5=-y | | 22x+4y=180 | | 9x^2-36x-33=0 | | -10(s+2)=23 | | 22+.5u=u-1 | | 5x/6-3/8=7x/4-2/3 | | 9e-2e= |