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)
c = (28/3)*x^15 // - (28/3)*x^15
c-((28/3)*x^15) = 0
c+(-28/3)*x^15 = 0
-28/3*x^15 = -c // : -28/3
x^15 = 3/28*c
x^15 = 3/28*c // ^ 1/15
x = (3/28)^(1/15)*c^(1/15)
x = (3/28)^(1/15)*c^(1/15)
| x^2+4x+4-9=0 | | c=28/3m | | x+3x+x-12=180 | | x+3x+x-15=180 | | x+3x+(x-12)=180 | | 3e+1=10p | | 5.4/.12 | | 54./.12 | | .7x-.3=.6x+4 | | tgx=0.0042 | | -4*96/100 | | 9(7x-1)=7(7x+1)+390 | | 4sin(x/2)cos(x/2) | | 11*(-11)= | | 25a^4-10a^2b^2+b^4=0 | | 3x+22-2x=9+4x-5 | | 63-7=36x+560 | | (x^2-3x+1)(x^2+3x-3)=5 | | 8x^2+117x-45=0 | | 272000/600 | | y^1=8y^2+91 | | 13-w=1-4w | | 4x^8-4ax^4+a^2=0 | | y^1=4y^2+556 | | 2x+16x^4=0 | | 4.9t^2-12t-65=0 | | 2x+17-17=41-17 | | 1000*272/600 | | 8-2e=2 | | 2x+16-16=56-16 | | 2x-5y+1=0 | | 9x+18=2x+16 |