If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( t )
t = 0
t = 0
t = 0
t in (-oo:0) U (0:+oo)
3/8 = 12/t // - 12/t
3/8-(12/t) = 0
3/8-12*t^-1 = 0
-12*t^-1 = -3/8 // : -12
t^-1 = 1/32
-1 < 0
1/(t^1) = 1/32 // * t^1
1 = 1/32*t^1 // : 1/32
32 = t^1
t = 32
t = 32
| (2x-14)/(3x-21) | | k/10=27 | | cos2x=-(1/2) | | 9/n=2/3 | | 25y^3-20y^2= | | 23n-22n-20=11 | | y=.50x+2.99 | | 2log(7)-2x=0 | | (5x^2+3x-4)+(2x+1)= | | 1/2*y=2 | | 1/2*y=3/4 | | 1/2*y=2/3 | | 320/300=183.8/x | | 1x/0x= | | (10-x)*x/2 | | 7x-5y=k | | 2x+1+5x-14=180 | | 267/300=163.6/x | | 4(3x-8)=42+10x | | -3[5g+1]-6=-9 | | 3a+2a-5a= | | 5s*7=30 | | X-3/4=3/8 | | y=6x+39 | | y=x^3+4x^2-10 | | -7w=-35 | | 2x-(8x+1)=3(x+1) | | w-42/4=93/5 | | 9(x+1)-5=6x+3(1+x) | | 9=6x-27 | | 12y^2-13y+3= | | X+(x+2)+(x+4)=85 |