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)
70/x-(70/x)-5 = -1/3 // + -1/3
70/x-(70/x)-(-1/3)-5 = 0
70/x-70*x^-1+1/3-5 = 0
-14/3 = 0
x belongs to the empty set
x belongs to the empty set
| 24^2=((3x-1)*(x+3))/2 | | y=4/3*1.3333-8 | | 1.66+0.33y= | | -4k(k-2)+14=3k-20 | | b^2-166+55=0 | | y^2-13y+22=0 | | (4x^2+x)(3)-(3x-2)(8x+1)=0 | | x=1/3x+2/5x+60 | | -(-7)=-7 | | 1092.03/1000=(1+r)^2 | | x=1/3+2/5+60 | | -7=-7 | | 6/18=7/18+3 | | 480/x-6=480/x+3 | | 0=-7x^2+7x+4 | | (6+z)(4z-9)=0 | | 4+1/2a=1 | | -4(x+2)+2x+6=5x+11 | | y=-(-8)+8 | | F(x)=-9x^2+4x+3 | | 0.15y+0.03(y+7000)=1290 | | -10p-4(3-4p)=4(p-3)-8 | | q+r+s=p | | (x-3)(y-7)=(x-4)(y-3) | | 7[z-(3z+29)+9]=2(z+10) | | (x+17)(y+2)=(x+22)(y+1) | | -15v^2+13v+20=0 | | 2+3(4x-5)=-2(4x-1)+2x | | 14(v+2)-2v=3(4v+2)-13 | | 4b^2-10b-6=0 | | y=-x*7-7 | | (9x^2+8)(6)-(6x-1)(18x+8)=0 |