If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
2*x = 0
2*x = 0
2*x = 0
2*x = 0 // : 2
x = 0
x in (-oo:0) U (0:+oo)
y/(2*x) = 36 // - 36
y/(2*x)-36 = 0
1/2*x^-1*y = 36 // : 1/2*y
x^-1 = 72*y^-1
-1 < 0
1/(x^1) = 72*y^-1 // * x^1
1 = 72*x^1*y^-1 // : 72*y^-1
1/(72*y^-1) = x^1
x = 1/(72*y^-1)
x = 1/(72*y^-1)
| y=3x+5y=-3x-2 | | 3a+10=31 | | H(x)=x^2-4x+2 | | 1/3y-11=1/8y | | x=7/(3-square7) | | 21-C= | | X+y=4x=y+1 | | (2w+9)(4+w)=0 | | 12x^2+3y^2=300 | | -2x-4=3-6x | | -2x-4=3-6 | | 4.6e+9= | | 4/5*45= | | 4(v-v-6)=0 | | Y=2/1x-2 | | 2000+500+x=1.34x | | 1000+500+x=1.34x | | X/2/5=10/11 | | n^(3/2)=729 | | 4r=7t+9 | | 2000+500+x=1.11x | | 2000+500+x=1.35x | | 5h+68-22h=5 | | 1000+00+x=1.4x | | 45x+5y=-20 | | x/300000=.1 | | 2x+4-10x=20 | | 2-9y=65 | | y+x-9=0 | | 55=7u-8 | | 3/5x-3/7=5/7 | | 10000+500+x=1.45x |