If it's not what You are looking for type in the equation solver your own equation and let us solve it.
t in (-oo:+oo)
t = 4*ln(98.6-(68/78)-68) // - 4*ln(98.6-(68/78)-68)
t-(4*ln(98.6-(68/78)-68)) = 0
t-4*ln(98.6-34/39-68) = 0
t-4*ln(29.72820513) = 0 // + -4*ln(29.72820513)
t = -(-4*ln(29.72820513))
t = 4*ln(29.72820513)
t = 4*ln(29.72820513)
| 2(x-5)=3x-12 | | 16+2x+73=2x+19+3 | | 14=s+12 | | 9x+18=6y-3x | | (3x+4)-(2x-9)=180 | | 5/6=x/82 | | X+5x-60=180 | | 2log(3)x=3log(3)5 | | Y-3=7(x-2) | | 7x-28=5x+10 | | (3x+4)+(2x-9)=180 | | 4x+5x-30=360 | | 5/4=x/82 | | 1/6y=1/9-15/14 | | .25x=.105 | | 6x+5(-6x+4)=236 | | 2x=3(2x+1)+5 | | 0.75x+9=14 | | -7/6x=-4/12 | | 6x+12-(x-6)=7+4(x-2) | | 8x+10y=-70 | | 5x/x^2-9 | | =8/7x=9/14-5/14 | | 4-2x^2=o | | 1/3=30 | | -2=1/2x-2 | | 8/9y=-32/63 | | 1298.528+-533.76x+22.2x^2+x^3=0 | | -9m-3m=6/5 | | x^3+22.2x^2-533.76x=-1298.528 | | -6x-3(2x-18)=150 | | 2x+36=-3x-8 |