$\left(3x-2\right)\left(5x+4\right)$
$\left(2\cdot11-2\right)-5\cdot3$
$\frac{d}{dx}\left(8x+2\right)$
$\frac{du}{dt}=\frac{\left(u-1\right)\left(t+2\right)}{\left(u+3\right)t}$
$225x^2-30x+1$
$\lim_{x\to\infty}\left(\frac{e^x}{7^e}\right)$
$\frac{26x^2+6x-9}{x^2+1}$
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