$\lim_{x\to4}\frac{x\:.\sqrt{x^2+9}}{2x\:-\:\sqrt{2x+8}}$
$-2\cdot\left(\left(-7\right)^2+-4\right)$
$\frac{1}{x-\frac{2}{x+\frac{1}{2}}}\cdot\frac{1}{2+\frac{1}{x}}$
$235\:+\:234$
$\int8\left(8x+32\right)^9dx$
$x2+x+1x+3$
$-100-8+-5-160$
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