$b2+10b+25$
$f\left(x\right)=-4x^2+4$
$-\int\frac{1+x}{x}dx$
$9a^2-12x+9$
$\int\frac{1}{x^2\cdot\sqrt{9-x^2}}dx$
$3a-3\left(b-4\right)\left|c+2\right|\left(a-b+3c\right)-\left(a+5c-2b\right)$
$\frac{x+5}{\:x}=\frac{5}{x-1}$
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