$2cos^2x-3cosx+1$
$x+2\cdot x+-x+1\cdot x-4$
$3\frac{x}{6}$
$\int2x\cdot\sqrt[2]{3x+2}dx$
$121x^2-4=0$
$\int x^3u^xdx$
$\left(t-10\right)^2$
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