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)
((7/12)*x^15)/25 = 0
7/300*x^15 = 0 // : 7/300
x^15 = 0
x = 0
x = 0
| 12=6-2(x+4)+4x | | 4(x+6)-8=96 | | -14-x=2x+1 | | 4(x-3)-1=39 | | 10k+3=3k(5+2)-4k | | -2/3×10 | | -5x=16+3x | | 4(x-8)+7=-45 | | 3(y-6)+8(y+2)=75 | | sqrt(3y^2/8x^2) | | 3(x+6)+2=50 | | 16x+1-3x+2=6(x+10) | | Tanx=50/20 | | 6-v=-4 | | 5x+7+2=20 | | -5.2=x+2.6 | | 4+e^2-x=20 | | 2(x+2)+4=-20 | | 5x=-x+36 | | V=(20-2x)(15-2x)(x) | | 4(x-4)+7=31 | | 100-3x=31 | | 9x+10-1=80 | | 8f-4(f+8)=8 | | 4x-15=39+x | | -7y-9=4 | | 19=x/4 | | 2(x+3)-5=-39 | | 4x+5=x-4x | | 2(2+b)=-34 | | x^3-5x^2+8x+152=0 | | 5*0.2-1= |