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)
N = (1/2)*(n^2-n) // - (1/2)*(n^2-n)
N-((1/2)*(n^2-n)) = 0
(-1/2)*(n^2-n)+N = 0
N-1/2*(n^2-n) = 0
N-1/2*(n^2-n) = 0
N-1/2*n^2+1/2*n = 0
N-1/2*n^2+1/2*n = 0
x belongs to the empty set
| (-4)(x+6)=(-40) | | 36/-6 | | A^7-1=0 | | 54-6x=168 | | y=4E-05x+10.055 | | Log^2x=7 | | Xfor(6+1)(4+2X)=56 | | -.5a+36+4a=-9a-12 | | 32x^5-y^5=0 | | 7x+3y=1500 | | 5/6=x/66 | | .5a+36+4a=-9a-12 | | X/40=3/8 | | 27=7q+6 | | 8y-70=94 | | X/6=45/54 | | -5y(-4xy)= | | 12x^3-12x^2+0=0 | | (x+3)(x-5-5i)(x-5+5i)=0 | | 5y(3x^2)= | | X/6=16/48 | | 2x(2y^2)= | | 5y(-4xy)= | | w^3+7w-99=0 | | 2x+3+3x=12 | | 4x-1=13-3x | | 10a=13 | | 9(x+4)+5=35 | | 4+4r-1=8r+5-2r | | 5(1+4a)=31+7a | | 16x+5=49 | | Y=-49+5 |