$4x^2-6x-1$
$\int e^{10x-1}10dx$
$cos\left(\frac{\pi}{2}-x\right)=sin\:x$
$\left(4^3\right)^2\cdot4^{-8}$
$sen\left(x\right)-sen\left(-x\right)$
$\int\sqrt{x}\ln\left(x^2\right)dx$
$2-5\cos\left(x\right)=7$
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