$\lim_{x\to\frac{3.14}{4}}\left(1-tan\:x\right)\:\sec\left(2x\right)\:\:\:\:\:\:\:\:\:\:\:\:$
$-x+2y+4-4x-y+1$
$\int_{-2}^2\left(3x+\right)dx$
$\lim_{n\to\infty}\left(\frac{\left(n+1\right)\left(n+2\right)\left(n+3\right)}{\left(n+4\right)\left(n+5\right)\left(n+6\right)}\right)$
$\left(8x^3+3y\right)^3$
$\left(2x+3\right)\left(2x-16\right)$
$\left\{7+\left[4-\left(-5+3\right)\right]-2\right\}$
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