$\sqrt{7^2}$
$-28x^3+12x^3$
$121c^2^2+66c^2+9$
$\int\frac{x^3+10x}{x\left(x^2+4\right)}dx$
$\int\sqrt{\left(x+2\right)^2+8}dx$
$\frac{3x+1}{3x^2+3x}$
$-1+-13+-3+2$
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