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)
1/x = 0.2 // - 0.2
1/x-0.2 = 0
1*x^-1 = 0.2 // : 1
x^-1 = 0.2
-1 < 0
1/(x^1) = 0.2 // * x^1
1 = 0.2*x^1 // : 0.2
5 = x^1
x = 5
x = 5
| x^2-4+13=0 | | 6x^2+54x-648=0 | | 5-3x=2x-7 | | 6-3.8=8.7+x-4.5 | | 18x^3-3x^2-14x=4 | | 3x^2+18x+8=0 | | dy=dx=y/x-1 | | 6x^2+90x-540=0 | | C=1/7πm²x | | x=((x+120)*0.25) | | -5.8+9.6=5.3n-4.3n+0.8 | | 0.3x+4.2=0.2x+5.1 | | 0.3x+4.2=0.2x+4.2 | | log(x)=9.5 | | 8=log(3)x | | -1.8=1.9-0.9-8.5 | | y=0.5x*x^2 | | 5y^4-29y^3+20y^2=0 | | 8^2/6.9^2 | | 3*(w+2)-2*w-3=0 | | X-(66-X)=30 | | 0.03(2x-18)=0.06(1+x)-0.6 | | 0.8x^2+1.1x-1=0 | | 10x-33=3(x+2)+7x-39 | | 2x^2-10x-7=21 | | 0.9x^2-1.9x+1=0 | | y-2=0+1 | | .1x-3=10 | | 3x-9y-7x+4y= | | 8+2(4x+5)=14 | | 5x-3=5+2(x-3) | | (18x^3)/(3x^2) |