$\lim_{x\to-1}\left(\frac{x^4+6x^3+4x+9}{x+1}\right)$
$\frac{1}{2}a+\frac{1}{3}a$
$2x\:dx\:=\:y\:dy$
$\frac{2}{1\infty}\cdot\left(4.1\cdot10^7\right)$
$\frac{1}{2}e^{2x}x^3+\frac{1}{4}e^{2x}x^2+\frac{1}{4}e^{2x}x-\frac{13}{8}e^{2x}$
$sinx\cdot cosx=1,5$
$x^2+8x+16=25$
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