If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( w )
w = 0
w = 0
w = 0
w in (-oo:0) U (0:+oo)
4 = 64/w // - 64/w
4-(64/w) = 0
4-64*w^-1 = 0
-64*w^-1 = -4 // : -64
w^-1 = 1/16
-1 < 0
1/(w^1) = 1/16 // * w^1
1 = 1/16*w^1 // : 1/16
16 = w^1
w = 16
w = 16
| 6put=at | | x+78=20 | | 102+45+x=180 | | f(t)=-5t^2+15t+50 | | 40x-2=32x+5 | | 6k=10+4k | | 2m+14-8m=56 | | 3/x=100/125 | | 5a+7a-9a= | | 4/3*27 | | 5j=-5+4j | | 86+(x+20)+x=180 | | n=-7n-8 | | 6/x=40/48 | | 4x-19=61 | | 8p+1=6p-9 | | 2m+4m+12=30 | | 4x/3x=432 | | -5y-9=-(-y-1) | | 3a-6b+5a+2b= | | x*x-8x=33 | | 5m+7.25=39.75 | | 4/3*343 | | 343*4/3 | | y+18=-70 | | 2/5(4x-7) | | a+3x=20 | | 3a-4=7a | | 6g-3=9 | | -4x+6=-6x+20 | | 0.2x+11-1.2x=4(5-x) | | -2x+6=2x+22 |