$\int\:\frac{5sen\left(2x\right)}{cos\left(x\right)}dx$
$\lim_{x\to0}\left(\frac{4x-3\tan\left(x\right)}{2\sin\left(x\right)-x}\right)$
$\frac{\left(\cos\left(7x\right)-\cos\left(3x\right)\right)}{\sin\left(7x\right)-\sin\left(3x\right)}$
$\int\frac{1}{x^2+1}+1dx$
$27x+72$
$2\sqrt{2x}$
$48-\left(34-\left(11+27\right)-15\right)-8$
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