$\left(1+\cos\left(x\right)\right)^2+\left(1-\cos\left(x\right)\right)^2+2\sin^2\left(x\right)$
$28^2+45^2$
$\frac{dy}{dx}-2y=2$
$\frac{2^{2x+1}}{2^{2x}}$
$\frac{x^2+6x+3}{x+1}$
$\int\frac{8x^3}{2x^4+5x}dx$
$y'-2x=0$
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