If it's not what You are looking for type in the equation solver your own equation and let us solve it.
sin(pi/18)*sin((4*pi)/9)-(cos(pi/18)*cos((4*pi)/9)) = 0
8*w = 21/2
2/x-(4*x) = 3*x-13
9/2 = 6/x
0;0;1;5;16;3
| 5x+2+5x+2=3x+8 | | x^2-1x+4= | | 8x-38=6(x-4) | | -2x+5-3x=-90 | | 1.50+3x=72 | | 5f^2-25f+30= | | -3x-18=-x-44 | | 8w=21/2 | | 2/x-4x=3x-13 | | -3(x-7)-6=x+39 | | Z+(-6)=(-12) | | 9/2=6/x | | 3x=0.75(x+7) | | -x-4=x/3=4 | | c=3.00p | | x(.15)=52 | | 5d+2(2+d)=3(1+d)+1 | | 20=8-y | | X+36+110=140 | | 3x+6=-6x+51 | | Y=8*x+5 | | 5(3p+2)=10-2p | | 3/4r-3/2=5/6 | | X^2+y^2+4x-12=0 | | -8=1/6y | | -6x-6(4-2x)=-4x+2(x-4) | | 8+3x=-14 | | -1.3=3.12 | | 8(5n)-19+17n-21=x | | 5/8=-1/2× | | 10x+6.25=10.75 | | 75=10x+50 |