$x^2+14x+1$
$68\cdot48$
$\lim_{x\to0}\left(\frac{1}{x}\right)-\cot\left(x\right)$
$\frac{dz}{dx}=\left(0.70\right)\left(w\right)$
$25a^4-30f^2+90f^2$
$-4+8-9-5-4+2+8+9-5$
$\frac{1-\cos^2\left(x\right)}{\tan\left(x\right)}$
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