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21*v-((3/3)*v*v)-((7/21)*v)-3 = 0
4.1*cos(0.9*x)
a/6-7 = 3
0.4*sin((pi/3)*x)
2*j-((1/2)*j)-6 = 12
| 4(5x-7)=72 | | 4x+7+5x=35 | | y=(x-2)(x+8) | | 3z-7=13-3z | | 30-[9+4(8-5)]= | | 2=12(20+-0.5y)-y | | 4x^2+3x=56 | | y=2300+B | | 4(p-1)+3(p+1)=100 | | f(x)=8x^2-48x+80 | | 10y-2=8y+5 | | 3y-7z=21 | | 130=3y+4z | | (x-15)+3x+35=180 | | 6/5=x15 | | 2ax-a=a+2 | | 5b*4=360 | | 2x^2+4x-94=4 | | x^2+9x-12=-13 | | 60x^2+87x-15= | | 21.3a=30+30 | | (8x+13)+(2x+7)=180 | | 21v-3/3v*v-7/21v-3 | | 6x=-6y+4 | | kx^2-28x=49 | | 3x+18=106 | | Y=23000+6*2 | | .75n+1-.25n=-100 | | a/6-7=3 | | -8n+-12n=100 | | -12w-9=4w^2 | | 10+5+c=5(c-4) |