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 = 0
(x^2)/25 = 0
x = 0
x = 0
(x^2)/25 = 0
(x^2)/25 = 0
1/25*x^2 = 0 // : 1/25
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
(2*x)/((x^2)/25)-(1/x)+5 = 0
(2*x)/((x^2)/25)-x^-1+5 = 0
49*x^-1 = -5 // : 49
x^-1 = -5/49
-1 < 0
1/(x^1) = -5/49 // * x^1
1 = -5/49*x^1 // : -5/49
-49/5 = x^1
x = -49/5
x = -49/5
| 3*x-21/6-x | | 5x-13=2x+7 | | 9x=2x+25 | | -2x-40=-7x+30 | | c-8=-14 | | 6x-40=44+3x | | 10b=8b+6 | | -6x-32=68-10x | | 32/(2*8)+4= | | 0.3w=-9 | | 9+10x=99-x | | 79-2x=25x+16 | | 10-3b+3=-1+2b | | 8x-7/3=10 | | 3(x+4)=2x-1 | | 4(x-7)-6=-16 | | (12/3y)/2y | | 4z-1=17 | | -21+5x=2x+18 | | -6x-27=-8x+13 | | 1x^2-12x=-35 | | 3x+-9=27 | | 326=x(x+2) | | 4[2p-(3-p)+5]=-7p-2 | | -8x-22=26-12x | | 3x^2+7=-22x | | x=5(3) | | -62+7x=98-x | | x=y(3) | | 1x^2+19=-20x | | -25+10x=8x+11 | | 3x+18=6-5x |