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)
5/x-x+7/6-6 = 2 // - 2
5/x-x+7/6-6-2 = 0
5*x^-1-1*x^1-41/6*x^0 = 0
(5*x^0-1*x^2-41/6*x^1)/(x^1) = 0 // * x^2
x^1*(5*x^0-1*x^2-41/6*x^1) = 0
x^1
(-41/6)*x-x^2+5 = 0
(-41/6)*x-x^2+5 = 0
DELTA = (-41/6)^2-(-1*4*5)
DELTA = 2401/36
DELTA > 0
x = ((2401/36)^(1/2)-(-41/6))/(-1*2) or x = (-(-41/6)-(2401/36)^(1/2))/(-1*2)
x = -15/2 or x = 2/3
x in { -15/2, 2/3}
x in { -15/2, 2/3 }
| -2x-5y=-25 | | (x+4)(2x-3)(5x-2)=0 | | 7x+5/4x=8 | | 6x+9=-5 | | -15+5y-5x=0 | | (16x-6)/(4x^2-3x-1)^0.5 | | (Y/12)+(1/6)=(y/2)-(1/4) | | -3y=-8x-36 | | 9/3(6*4/8) | | 99+5u=-3u | | 16x^5-16x^3+2x=0 | | 6x+2x-250=2x+x-60 | | 3r-18=2r+7 | | 9x+24=3x+4 | | 434*62= | | 4/3(7+n)=12 | | 2x-15=-3x+21 | | 59x=-310 | | 4y-(y-5)=-2 | | 1/4(9y-2)+1/8(6y+9) | | 5x/4=5- | | 2x+3/4=5- | | 2(y-1)+y=-2 | | 1+4x+3=10x-12-2x | | 10+2+8= | | 85=x-1+4 | | 5/2x=25/4 | | 4(x+8)=2x-10 | | 16+x=9x | | 9+7=711 | | 3(4x^2-6x^3+5x-7)-(4x^3-3x^3+11x+5)=0 | | -22x^3+15x^2+4x-26=0 |