If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
t_1 = X^2+5
t_1+16/3*x^2-8*x-6*x-12*x = 0
t_1+16/3*x^2-26*x = 0
DELTA = (-26)^2-(4*16/3*t_1)
DELTA = 676-64/3*t_1
676-64/3*t_1 = 0
676-64/3*t_1 = 0 // - 676
-64/3*t_1 = -676 // : -64/3
t_1 = -676/(-64/3)
t_1 = 507/16
DELTA = 0 <=> t_2 = 507/16
x = 26/(2*16/3) i t_1 = 507/16
x = 39/16 i t_1 = 507/16
( x = ((676-64/3*t_1)^(1/2)+26)/(2*16/3) or x = (26-(676-64/3*t_1)^(1/2))/(2*16/3) ) i t_1 > 507/16
( x = 3/32*((676-64/3*t_1)^(1/2)+26) or x = 3/32*(26-(676-64/3*t_1)^(1/2)) ) i t_1 > 507/16
t_1-507/16 > 0
t_1-507/16 > 0 // + 507/16
t_1 > 507/16
x in { 39/16, 3/32*((676-64/3*(X^2+5))^(1/2)+26), 3/32*(26-(676-64/3*(X^2+5))^(1/2)) }
| 7[x+2]=-49 | | 5ab-8+7ab-2a= | | 9z^3+4z=12z^2 | | 15n^2+17n+6=10 | | x^2+13=134 | | 5a^2-24a+16=0 | | 5z+3=128 | | 7+ln(27x)=28-2ln(x) | | 13x+7=12x-3 | | -m+2=0 | | 3u^9*2x^4u^4*5x= | | -29/41-(-12/41) | | 6x^2-13=281 | | 1-3v=-20 | | 15n^2+17n+6=0 | | 6x-13=281 | | 1+4b=5 | | 1x/4-1=1x/7+2 | | 5+4m=29 | | 2-2p=6 | | 1.7=fraction | | -9=-14+b | | 0.285x^2-2x+2=0 | | 16=18+z | | x/2+17=22 | | 2p+5=25 | | -17=-15+x | | f(x)=895+30g | | 15n^2+17n=4 | | -2=-20+y | | -5b+4=39 | | 12+m=-8 |