$\int e^{a\cdot x}\:sen\left(k\cdot x\right)$
$\frac{cosx}{cot^2x}$
$2\sin^2\left(b\right)-5\sin\left(b\right)=2$
$\frac{29x-56}{3x-7\:2x-3}$
$\left(-10.4248\right)-\left(-6.9248\right)$
$\ln\left(\frac{5}{4x^3}\right)$
$2-2+1+7$
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