$10-\left(-3\right)-4-\left(3-4\right)$
$375\cdot5$
$\frac{dx}{dt}=\frac{\left(2t-2t^3\right)}{x}$
$\cot\left(a\right)+\:\tan\left(a\right)=\sin\left(a\right)\:\cos\left(a\right)$
$\sec\left(x\right)\csc\left(x\right)\cos\left(x\right)$
$3x^2+3=ln5xy^2$
$\lim_{x\to0}\left(\frac{1-\cos\left(\left(2x\right)\right)}{x^2}\right)$
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