$\frac{x}{9}=\frac{2}{3}$
$\int\:\:\:sec\left(2x\right)^5tan\left(2x\right)^3dx$
$3a+2b-c+4c+b$
$\frac{5x^2-8x-9}{x+1}$
$5xy-y=9x+4y$
$5a+35$
$3-cos2x+4sinx=0\:$
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