$\int\frac{21x-15}{x^2-x-2}dx$
$cos\left(sin^{-1}u+cos^{-1}v\right)$
$0,1\:\cdot12$
$\int-\frac{3}{4}\cdot x^{11}dx$
$\left(8a^4m^2n^3\right)^4$
$\int\left(\frac{\sqrt{4x^2+1}}{x^4}\right)dx$
$\left(-90\left(-90\left(0\right)\right)\right)$
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