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)
(12/2)*x-(1/x)-10+5 = 7/2 // - 7/2
(12/2)*x-(1/x)-(7/2)-10+5 = 0
(12/2)*x-x^-1-7/2-10+5 = 0
6*x^1-1*x^-1-17/2*x^0 = 0
(6*x^2-17/2*x^1-1*x^0)/(x^1) = 0 // * x^2
x^1*(6*x^2-17/2*x^1-1*x^0) = 0
x^1
6*x^2+(-17/2)*x-1 = 0
6*x^2+(-17/2)*x-1 = 0
DELTA = (-17/2)^2-(-1*4*6)
DELTA = 385/4
DELTA > 0
x = ((385/4)^(1/2)-(-17/2))/(2*6) or x = (-(-17/2)-(385/4)^(1/2))/(2*6)
x = ((385/4)^(1/2)+17/2)/12 or x = (17/2-(385/4)^(1/2))/12
x in { (17/2-(385/4)^(1/2))/12, ((385/4)^(1/2)+17/2)/12}
x in { (17/2-(385/4)^(1/2))/12, ((385/4)^(1/2)+17/2)/12 }
| y-16=2x^2-8x | | 35y+6=15 | | 3+46=5-14 | | P*0.002=0.02697694969*(8.31*(0.002*P)/(498*0.02697694969))*498 | | 7(2-5y)-3(2y+5)= | | 3z^2-42z+39=0 | | 3x+44+(158-4x)=180 | | 5a-10+15=20 | | x*0.5-1=x*1.25 | | 2x^2=88x | | x*0.5-1=x*0.25 | | 5(x-6)=8 | | [x-(-2)]+(y-3)=3 | | 6x-28=4x-16 | | 4x-5=x+7-4x+1 | | 3x-12=2(x-6)+x | | 70/5 | | -7(1+4y)=13(2y+3) | | (3x-2)=(3x+2) | | -4z=-24 | | 4x^2-9x+21=6x+7 | | 3x=7-2x | | x^2+18x+26=-4x+2 | | x^2(x+9)=400 | | log[5](x+5)-log[5](x-5)=2 | | 5-(f+3)=-1+2(f-3) | | -3k(k^(7/5)-4k^(2/5)) | | sin^2x=-sinx | | 9x+5y=18 | | (8x*3y+67)=d | | 2=a/5 | | x(x-3)/2=2700 |