If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
-256*a^12*b^11 = 0
-256*a^12*b^11 = 0
-256*a^12*b^11 = 0
-256*a^12*b^11 = 0
x należy do R
x belongs to the empty set
((4*a^3*b^4)^4)/(-256*a^12*b^11) = 0
x belongs to the empty set
| 6=8(s-4/3)-20 | | 2sin(3x+1)=0.5 | | 165=-u+41 | | 0.25mL= | | -v+254=76 | | 24g^2h^3+32g^2-16h^3+8g^3= | | 2x+3y=82 | | 35+20+.75x=45+.85x | | 2[3x-(4x-6)]=5(n+5) | | 2u+24=6u | | -2(-17x-13)=-36(-33-2x) | | 2C-10C^2+8C^3=0 | | 6/15/12/5 | | 5x^2-16=84 | | 0.59x+21=1.29x | | 0.5y-0.75=-9 | | 0.5-0.75=-9 | | 1n-6+7n=42 | | 3y-5=5y+8 | | (-48x)+144=144-(48x) | | 28/60 | | -6/15/12/5 | | d/dy(ln(2/y)) | | -5(3+x)=20 | | (3x-10)/5-(2)=11 | | -3(2/3)/7(3/5) | | 3x-10/5-2=11 | | 7t/2=-14 | | 7t/2=14 | | −10±√200/6 | | 3x+-0.04y=72 | | (5/6)/(5/4) |