$x^2-m^2=0$
$\int\frac{\left(5x^2\right)}{x^4-1}dx$
$2\sec\left(x\right)=\frac{1+senx}{cosx}+\frac{cosx}{1+senx}$
$-8a+4b-6a+81b-114b+81a-a-b$
$3b^2\left(3rt+4t\right)+6cr+8ct$
$12c-5c+3c$
$6 + \sqrt { 3 x + 1 } = 11$
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