$\left(x^2+\frac{3}{x}\right)^n$
$\left(4\sqrt{3y^5}\right)^2$
$-\left(-4\right)^4$
$\frac{1+cos\:x}{sin^2x}=2$
$cot^2x-tan^2x=0$
$\int\frac{x}{x^3+2x^2+x+2}dx$
$\int sen^53x\cdot cos3x$
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