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)
((31/5)*x^21)/4 = 0
31/20*x^21 = 0 // : 31/20
x^21 = 0
x = 0
x = 0
| 5+t-(7-3t)=2t+10 | | 10x+21-3=x^2 | | -15=3m+6 | | x^2-40x+345=0 | | 2-n=-8-2n-4n | | 54=34+k | | Tan40=25/x | | B=0.3s+50 | | cos52=13/x | | 24u^4v^9+18uv^2w^8=0 | | 3-(4x-2)= | | -22.8=6 | | 17625+550x=0 | | 5/7y= | | 4+x=y | | 3.8(7-y)=-24 | | 28-13=5(x-5) | | 2n=38 | | 10x^2-52x-10=0 | | 10m-2/5=9/33 | | 1(x+2)=-3(x) | | -6(8n-2)=-33-3n | | x^2-34x-322=0 | | x+19=7+3x | | X/2-18=-7 | | f(2)+f(8)= | | 22+3p=7(4p-4) | | (20x^2)-18x-81=0 | | 3.89(-y)=-24 | | X^2+1+6x=0 | | -8(y+5)=0 | | 9y=-9x+18 |