$121p^{36}-\frac{25}{81}x^{2}$
$b2+10b+25$
$\left(4x^2-2x+1\right)+\left(x^2-3x+1\right)-\left(5x^2-2x-3\right)$
$x^2-10x+19=0$
$2x-4-1+x$
$\frac{x\cdot sec^2x}{tamx}$
$-114-78$
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