$\frac{dy}{dx}+y=e^{2x}$
$3sin3x+sinx=10sinx\:-12sin^3x$
$\int _ { 2 } ^ { 2 } d x$
$50-50\left[3-3\left(4-4\cdot2\right)-5+5\cdot2\right]$
$2x^2+8x-7=-2$
$sen\:a\left(1-cos\:a\right)\left(1+sec\:a\right)$
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