If it's not what You are looking for type in the equation solver your own equation and let us solve it.
z in (-oo:+oo)
z^7*((2*z^8)/7) = 0
2/7*z^15 = 0 // : 2/7
z^15 = 0
z = 0
z = 0
| v=144(3.14) | | 4(w-13)+17=19 | | -9x-5(3-4x)=6(x-4)-36 | | -7(x+4)= | | X=-(-10)/2(-5) | | 6h-h+2=17 | | 3x+7(x-9)=3(x-14) | | 6x+7=7x-1 | | Sin=-2 | | 14-w=17 | | cosz=-2 | | -1/2=3/5y-1/3 | | 9(3a+8)= | | cosz=-3 | | 4x^4/6/5x^3/6 | | -1/3v-1/2=-3/7 | | 12+2j=-j | | 5X=245 | | Y=-4x^2+16x-16 | | (4x+25)+x=180 | | 20+2k=-18k | | 5x+6=30+3x | | 5p^2+3=12p | | 3x^2+9x=-30 | | 5x/3+15/2=2x+10 | | -3(c+3)=4(c+3) | | 11-k=-10 | | 2(c-14)=-8 | | (4x+25)+y=180 | | x/2+1,5=6 | | y=5t+30 | | 808-m=722 |