$\left(5x^{a+1}+4\right)\left(5y^{a+1}-14\right)$
$\frac{2x^2+3}{x^2}$
$\left(8-y\right)^2$
$\lim_{x\to0}\left(\frac{1+sen\left(x\right)}{2x}\right)$
$\int\sin\left(7x\right)\cdot\cos\left(7x\right)dx$
$\left(.25\sqrt{1.0144}-2.083333333\left(-.12+\sqrt{1.0144}\right)\right)$
$625\cdot5$
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