If it's not what You are looking for type in the equation solver your own equation and let us solve it.
f in (-oo:+oo)
f/(-13) = 0
-1/13*f = 0 // : -1/13
f = 0
f = 0
| h(t)=-5t^2+30t-25 | | -5n-2n=21 | | 20u^3-180u=0 | | X+3y=119 | | 36x^3+53x^2+9x-6=0 | | 4(3x+2)+5(1-2x)=26 | | -(7)/(x^2-4x-4)0 | | k=-6+4k | | -4=2n-n | | -4p-6(p+1)=-86 | | (4+7i)+(9-2i)= | | 9x^2+63x+20=0 | | 1000000000000000000000000000000000+85874639263927-87436326283634893467-73462736484658662132+324521738363857= | | -5=5x+4+6 | | -9w=63 | | 3600=400x-3x^2 | | 2g+4+5g=-6+6g | | -18+5x=-1x-1 | | 4*(7n+2y)+2*(4n-6y)= | | 0.50x+0.45(30)=31.5 | | 3x+2y=161 | | 19=n-5-5n | | (2x-1)+(5+5x)=90 | | 11+2ln(x)=6 | | 11+2lnx=6 | | m+(2-8m)=-12 | | 9a+b+2b-10b= | | F(n)=3n+10 | | -3y-15=5y+25 | | 1/13a=1/2 | | 4x^2+16x-24=0 | | x+16=89 |