If it's not what You are looking for type in the equation solver your own equation and let us solve it.
(x+1)(x+2)(x+3)(x+4)-15=0
We multiply parentheses ..
(+x^2+2x+x+2)(x+3)(x+4)-15=0
We multiply parentheses ..
(+x^2+2x+x+2)(+x^2+4x+3x+12)-15=0
We move all terms containing x to the left, all other terms to the right
(+x^2+2x+x+2)(+x^2+4x+3x+12)=15
| X^2-6x-11=4x | | 1,5x^2+4x-299=0 | | 6y^2+10y-16=0 | | 5p+4=31 | | 2×(4x-1)=15 | | 5x^2+49x-48=0 | | 5x^2+49x+48=0 | | 20x-2(x-5)=3(2x+19)- | | 0.25=(x/80000)*100 | | xx+9=15 | | 0.85x=x-150 | | 5.4^x+3×8.2^2x-1=4.8^3x | | R×0.6=15-x | | 4w+12=6 | | 6r-4=4r-2 | | 7=6t+6 | | 6k+7=79 | | 2x/5+6=14 | | 13-2g=17 | | 1=3x+14 | | 39=180-2i | | 59x-17=39x+1 | | 5y+1/3y=-1/2 | | (D²+D+1)=x² | | 9x-23=5x+21 | | (D²+D+)=x² | | 13x-13x=-5+4 | | 3x=625 | | x+(x*0,04)=1000 | | x+400=1000 | | x+2x+3x-5x=27-14 | | x+x+2=4x |