If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( s )
s = 0
s = 0
s = 0
s in (-oo:0) U (0:+oo)
s/3-(3/s) = 0
s/3-3*s^-1 = 0
1/3*s^1-3*s^-1 = 0
(1/3*s^2-3*s^0)/(s^1) = 0 // * s^2
s^1*(1/3*s^2-3*s^0) = 0
s^1
(1/3)*s^2-3 = 0
(1/3)*s^2-3 = 0
DELTA = 0^2-(-3*4*(1/3))
DELTA = 4
DELTA > 0
s = (4^(1/2)+0)/(2*(1/3)) or s = (0-4^(1/2))/(2*(1/3))
s = 3 or s = -3
s in { -3, 3}
s in { -3, 3 }
| 500=x-50 | | x^2-3x+2x^2-x=3x^2-6x-3 | | 7-sy+7x-(-10)+5xy-3x= | | 5x-15/5x | | 3x=2x+7.5 | | 3q^2-36q+750=0 | | 8x+4-x=-3-2x-11 | | 9a-2-2a+3= | | 18a+(2b-4a)= | | y^2-3.3y-10=0 | | 3(2x+5)+8=4(x-1) | | 8x=6x+26 | | 26+6x=8x | | 3x^2-18x+750=0 | | a^2x+ax+6a=a^2+12a+9 | | Y=103-2x | | 150+3x=x+300-t | | 6*h=8*2 | | 2x/5-5 | | 2x-6x+12=36 | | x-(0.08x)=500 | | (25b-5)-6(4b+3)=-6 | | (25b-5)-6(4b+1)=-6 | | 7x+x=12+8 | | (12m)/4 | | 4x+14=-99+10x | | x-((8/100)*x)=500 | | x^2-7x+10=x^2+5x-6 | | 3(2m-1)+5=-9 | | 5-3(2p-1)= | | 9x^2+2x=-3 | | (2-i)(4+3i)= |