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-4 = 0
x-4 = 0
x-4 = 0
x-4 = 0 // + 4
x = 4
x in (-oo:4) U (4:+oo)
3/(x-4) = 0
3 = 0
x belongs to the empty set
x belongs to the empty set
| 2cotx=-7 | | x(3x+4)+2y=-6 | | (-x)-4(-x)+10=(-x)-x | | -1.8-7.8=1.9-0.9n-8.5 | | F(5)=8x+9 | | 0=2x^2-15x+15 | | 3x+2(-x)+x+7=x+3 | | 3x^2-4x=119 | | d^2+5d+66=0 | | W^2-72=0 | | 159-45+y=180 | | 1/2(1/2h)h=121 | | 4(-x)-(-4)=-8 | | X=16x-220 | | 8=3x+2r | | 2-(-5)=2+5+t | | -8+r=-5+(-7) | | 2m+9=4m-1 | | 2+-9=8-z | | n-8=4+6 | | 1/3x8/3 | | Sin(x+10)=cos(3x) | | 17x^2-12xy+8y^2-80=0 | | 8+4=m+5 | | 8=2r+3x | | 20000000=2/3x | | (x/12)−92=-75 | | -4x(x-3)=-x | | 18x+5=-8(-2x+6) | | 25x+8=233 | | 3m^2+4=52 | | 3r+3(r+6)=300 |