If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( h )
h = 0
h = 0
h = 0
h in (-oo:0) U (0:+oo)
2.6/13 = 8/h // - 8/h
2.6/13-(8/h) = 0
2.6/13-8*h^-1 = 0
-8*h^-1 = -0.2 // : -8
h^-1 = 0.025
-1 < 0
1/(h^1) = 0.025 // * h^1
1 = 0.025*h^1 // : 0.025
40 = h^1
h = 40
h = 40
| a^2-6ab+8b^2=0 | | (y-6)-(y+4)=7y | | 10*cos(8x)=-5 | | 5+4x=5(x+5)+3 | | 24(1)-8(9)=-48 | | x-4-3x=-2x+3 | | (4/5)*(-25/3) | | 4(8+2x)=4x+8 | | 36(1)-6(9)=-36 | | 24(1)-8y=-48 | | X-74=106 | | 3(4+c)=30+x | | 3(4+x)=30+d | | tanx*sinx=3cosx+2 | | 3x-141=285 | | ln(xy)+x=4 | | x^2-112=32 | | -.3d+(-2.8)=-4 | | -10+7+(-1)= | | 7-85/12 | | 2x+3+100=180 | | 2x+103=180 | | 3(3+b)=5(7b+1) | | 8x-5=260 | | you+farted= | | 3(4x)=x+28 | | b^2-16b-8=0 | | 5(7b+1)=3b(3) | | (-7R)(-4R)= | | h(x)=x+9 | | Mx+2nx=pforc | | 12x+2=13-5x |