If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
3-x = 0
3-x = 0
3-x = 0
3-x = 0 // - 3
-x = -3 // * -1
x = 3
x in (-oo:3) U (3:+oo)
7/(3-x) = 0
x belongs to the empty set
| 6/(6-8i) | | 7+u=-8 | | 7/3-x | | X(11)=55 | | y=4x^6/2x^4 | | .10+2.5(7)=6.25 | | 6a+12=9a+6 | | (g-5)-3g=1+g | | -2x^2+2x-17=0 | | 2(2)-1/5=2(y+7) | | 6a+12=9+6 | | 48=20xn | | 6x^2-54/4x^2-36 | | 7x+9=3x+57 | | 6n^2-6n=12n+36 | | 2(3*2-7)=9y | | x^3*(4e^4x)+3x^2*e^4x=0 | | 28k-4d=5d-17 | | x^3+2x^2-3x+20=0 | | -2a-5(a+3)=20 | | 14=5+9(x-9) | | 29=j/17 | | a/9-a/5=-16/3 | | 1/x=x/9 | | H/25=27 | | 150x+y=1050 | | 25=c/31 | | 5(2x)-3=24x+27 | | Z-49=70 | | x^3/2-18x^1/2=0 | | 23u=736 | | (3x^2-5x+7)(2x^2+4x-9)= |