If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
(1/25)*x^4-(81*y^6) = 0
(1/25)*x^4-81*y^6 = 0
1/25*x^4 = -(-81*y^6) // : 1/25
x^4 = 2025*y^6
x^4 = 2025*y^6 // ^ 1/4
abs(x) = 3*25^(1/4)*y^(3/2)
x = 3*25^(1/4)*y^(3/2) or x = -(3*25^(1/4)*y^(3/2))
x in { 3*25^(1/4)*y^(3/2), -(3*25^(1/4)*y^(3/2)) }
| S-(-10)= | | -34x=-17 | | -21/x/3x=31 | | -222=3x | | 12y=46 | | 4x-10-x=26 | | -3x-13+6x=14 | | 4x+-4y=-9 | | -3(5+8m)+10m=-141 | | 9-9(-n-4)=117 | | log(4x+9)=1+log(x-5) | | p^3/4(p^1/4-2p^9/4) | | x+5y-6z=0 | | -3(8k+5)=-183 | | 3u^2+7u-6= | | 11a-5=13a+13 | | -148=4(-9-4r) | | (x^3-1)/(x-1) | | y/3-7=-4 | | 18=-8p-p | | -9x^2+5x-3=0 | | -15x^2+50x+40=0 | | y=-2-6(x+2) | | x*x+3x+3=294 | | 2t^2+5t-3= | | 2t+5t-3= | | 36p^2-49q^2= | | r^2+12r+20= | | -10y-12=11y-7 | | 17x-19y=-10.5 | | 14x-3y=4 | | x^2=(13y^2+1) |