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 = 0
x = 0
x in (-oo:0) U (0:+oo)
-x-(7*x)-(1/x)-13/2-2 = 0
-x-7*x-x^-1-13/2-2 = 0
-8*x^1-1*x^-1-17/2*x^0 = 0
(-8*x^2-17/2*x^1-1*x^0)/(x^1) = 0 // * x^2
x^1*(-8*x^2-17/2*x^1-1*x^0) = 0
x^1
(-17/2)*x-8*x^2-1 = 0
(-17/2)*x-8*x^2-1 = 0
DELTA = (-17/2)^2-(-8*(-1)*4)
DELTA = 161/4
DELTA > 0
x = ((161/4)^(1/2)-(-17/2))/(-8*2) or x = (-(-17/2)-(161/4)^(1/2))/(-8*2)
x = ((161/4)^(1/2)+17/2)/(-16) or x = (17/2-(161/4)^(1/2))/(-16)
x in { ((161/4)^(1/2)+17/2)/(-16), (17/2-(161/4)^(1/2))/(-16)}
x in { ((161/4)^(1/2)+17/2)/(-16), (17/2-(161/4)^(1/2))/(-16) }
| 0.095-0.0071= | | (1x+2xy+1x+5y)= | | 32=12+c | | -(8x-2)+6x-3=-1 | | h=-at | | -53=-12+3r | | 8v^2+5v+1=0 | | 5.2-0.12= | | 2.5x=x+12 | | x-6=21x | | 6-4(3-2p)=5(p-4)-10 | | 3.6r-4.5r=-6.48 | | -2/3=y-4/5 | | 7y=-24+8x | | 61.43-21.75-13.62=b | | 5x+4y-5z=-20 | | -109.3-183.6=t | | 4x+12=2.5x | | 8x-7y=24 | | F-5=4 | | 32.5-7.375=l | | 8+5(1-3m)= | | 7x^4+16x^2-3=0 | | 7+5i= | | -18=-6+2b | | 17x^4+26x^2-3=0 | | -9=-6+B | | 4.79n+3.9=-13.035 | | 24k=40 | | X+X+.33=280 | | (2y-3)(8+y)=0 | | -2.5n-1.222n=-17.8656 |