$x.\left(a\:+\:l\right)\:-\:t.\left(a\:+\:1\right)+5\left(a\:+\:1\right)$
$4x^3+3\left(4x^23\right)+3\left(4x\:3^2\right)+3^2$
$-168\::\:-7$
$y'\:=\:4y\:+\:x^2\:+\:9$
$\lim_{h\to0}\frac{\left(\frac{1}{x+h+2}\right)-\left(\frac{1}{x+2}\right)}{h}$
$\left(2a+3a\right)\left(2a+5b\right)+\left(3a-4b\right)\left(3a+4b\right)$
$\lim_{x\to\infty}\left(\frac{5x+1}{5x+\sqrt[3]{x}}\right)$
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