$3\left\{4\left(2668+46\right)+201-165\right\}$
$6x^2+8x-8$
$5\sin\left(30^{\circ}\right)-3\sqrt{2}\sin\left(45^{\circ}\right)+\frac{1}{4}\tan\left(45^{\circ}\right)$
$98\cdot2$
$\lim_{x\to0}\left(\frac{e^x+3x-1}{4x}\right)$
$3x-10=18-x$
$\int\left(x\cdot\cos\left(3x^2+1\right)\right)dx$
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