If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
(14*x^3)/(25*y^2) = 0
25*y^2 = 0
10*y^4 = 0
(14*x^3)/(25*y^2) = 0
(14*x^3)/(25*y^2) = 0
14/25*x^3*y^-2 = 0 // : 14/25*y^-2
x^3 = 0
x = 0
25*y^2 = 0
25*y^2 = 0
25*y^2 = 0
x należy do R
10*y^4 = 0
10*y^4 = 0
10*y^4 = 0
x należy do R
x belongs to the empty set
((21*x^4)/(10*y^4))/((14*x^3)/(25*y^2)) = 0
x belongs to the empty set
| 7+7y=28 | | 16-(x+9)=4x-8 | | 0=x-2x+2 | | 5x-3(x+2)=7x+1 | | 14b=-5656 | | 2d=2+4 | | 5x-4-5[x-2]=6 | | cot^2-9=0 | | 3[2b+4]-6b=12 | | x=(m-y)/b | | -18k-6k-3k=6+1 | | (4x+11)+5x=180 | | x=m-y/b | | 100-1r=99.52 | | c(x)=x^2-40x+640 | | y=-bx+m | | 4[h+3]+2=2[2h] | | 4c=4.3 | | 4-6.2=13 | | 6-15=-9 | | 91=-7(7+4x) | | 5x^2=x+132 | | (4y-9)(7-y)=0 | | 4[h-2+2h]=20 | | 8x+72+2x+126=180 | | 5(5z)= | | -2x-2=x+10 | | 3b-3(b+1)=5(b-1)-5b | | 3=b-11 | | 6x-1=68 | | 9(x·2)=180/2 | | a+36=24 |