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4/9 = 18/22
4/9 = 9/11
L <> R
| A(x)=x*(90-x) | | x^2*(x^3-1)+4x*(3x^2+2)= | | 2x-9/x_7x/2=5/x-7 | | -2cos(x)=sin(x+60) | | P=39(4) | | -2cosx=sinx+60 | | x(x+3)-1=0 | | x^8=6 | | graphy=4sinx | | 2a+(a+10)=180 | | 16=8(8+9) | | 8x-6=6x+9 | | x=x/-5 | | x=-5/5 | | 2h-4=5h-19 | | 18=6(x+10) | | P=1/4(39) | | P=1/4*39 | | 7k+4=10k-20 | | 4/b=1.96 | | 14x+28=-5x+5 | | 3x(x-5)=5x+1 | | 3x-(x-5)=5x+1 | | Y=3-1.5x | | (3x+4)*2+(5x+-1)*2=38+x | | b/4=1.96 | | 2x+1x^2=3 | | 16a+56=15a-40 | | ax^2-5=10 | | 5m=27 | | 8l=44 | | f(x)=a/b-x |