If it's not what You are looking for type in the equation solver your own equation and let us solve it.
M in (-oo:+oo)
M = 1/5-((-5/13)/7)-(13/7) // - 1/5-((-5/13)/7)-(13/7)
M-(1/5)+(-5/13)/7+13/7 = 0
M-1/5+(-5/13)/7+13/7 = 0
M+729/455 = 0 // - 729/455
M = -729/455
M = -729/455
| 0.4*3d-5=4 | | X/2+5/2+x/2-1/2=x/3-1/3 | | z=10+h | | 6x+9=7x-17 | | 10-x+x=4 | | -9-10(5b-3)= | | 4x+1=8x+29 | | 5+(3-2)+216= | | 10+4x=x+16 | | 6x+9=7x+17 | | 10x-3x-5=23 | | -0.3+r= | | 6x-9=7x-17 | | 14-4z=2(-13-2h) | | 27x+18=48x-24 | | -2+4x=7x+31 | | 95/10 | | 5n-14=3v | | b-7+4b=24 | | 10x-3x+4-2=20 | | 6x-9=7x+17 | | g=3(w+4)+5 | | 20a^2-15a=5a | | 2u=8+3u | | -(1+2n)+7= | | 4100=500+20x | | 1/4+3/8+1/3 | | -30=6+6x | | 15x+16y+11+20x-8y-12= | | (8+7)=19+56 | | -5m-7+4m=-(m-7) | | 8x-=7x+8 |