$\int\sin\left(4x\right)\cdot\cos\left(6x\right)dx$
$1+5\cdot\left(4+9\right)\cdot3+2-1\cdot\left(3-2\right)$
$x3-49x$
$\int sec\:\left(0.05\cdot x\right)-1$
$\lim_{x\to0}\left(\frac{x}{1-cos\left(x\right)}^2\right)$
$4\left(11+7\right)-9\cdot8$
$\:\frac{6x^2+16x+8}{3x+2}$
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