$\frac{5\pi}{10}+\frac{4\sqrt{6}}{10}$
$2x+1=u$
$\lim_{x\to\infty}\left(\frac{9x+7}{x^2-3}\right)$
$5\left(-x-1\right)=-5x-5$
$5-\left(-12\right)-8+6-\left(+5\right)+10-5\left(-9\right)+3$
$\left(\frac{3}{4}x^2+\frac{1}{8}b^2\right)\left(\frac{03}{4}x^2-\frac{1}{8}b^2\right)$
$8y-4<52$
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