If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( y )
3*y^3 = 0
3*y^3 = 0
3*y^3 = 0
3*y^3 = 0 // : 3
y^3 = 0
y = 0
y in (-oo:0) U (0:+oo)
(18*y^7-(12*y^3))/(3*y^3) = 0
(18*y^7-12*y^3)/(3*y^3) = 0
18*y^7-12*y^3 = 0
6*y^3*(3*y^4-2) = 0
3*y^4 = 2 // : 3
y^4 = 2/3
y^4 = 2/3 // ^ 1/4
abs(y) = (2/3)^(1/4)
y = (2/3)^(1/4) or y = -(2/3)^(1/4)
6*y^3*(y-(2/3)^(1/4))*(y+(2/3)^(1/4)) = 0
(6*y^3*(y-(2/3)^(1/4))*(y+(2/3)^(1/4)))/(3*y^3) = 0
( 6*y^3 )
6*y^3 = 0 // : 6
y^3 = 0
y = 0
( y+(2/3)^(1/4) )
y+(2/3)^(1/4) = 0 // - (2/3)^(1/4)
y = -(2/3)^(1/4)
( y-(2/3)^(1/4) )
y-(2/3)^(1/4) = 0 // + (2/3)^(1/4)
y = (2/3)^(1/4)
y in { 0}
y in { -(2/3)^(1/4), (2/3)^(1/4) }
| .33y+4=-9 | | 1.8+x+5=3 | | 8y+7y=3-16 | | Log(7x+5)=1+log(x-9) | | -14.8=(u-11.5)/5 | | 2(y+5)=5y-8 | | (4+y)+(5-y)+x+8=19 | | 5*2/5 | | 582/5 | | 3x+2y+2= | | 6X^2-2304=0 | | 2a+2b=6 | | 3x-27+3x+69+3x+21+5x-41+4x+8=180 | | (x+1)2+5(x+1)+4=0 | | .65x=2500 | | -14.8=u/5-2.3 | | u/5-2.5 | | 3(5c+1)-12=13c^3 | | 0=3x^2-5x-4 | | 2x+20=3x+8 | | 4log(x-4)=12 | | y^2*x=19.979*x^2 | | 9-x+3x-9x= | | 93=201t+16t^2 | | 20=q(3)+r | | -11(9-3n)= | | 14y+4=180 | | 11y+1=180 | | 8x^2+41x-39=0 | | -3(t-4)+9t=3t-4 | | log(x+3)+log(x+21)=5 | | y/y^3=x |