$\int\frac{cosx}{3sin^2x+2sinx}dx$
$\frac{d}{dx}\left(x^4+y^3\right)^5=x^2-y^2$
$\frac{d}{dx}\ln\left(2x+y\right)$
$y4+4+2y^2$
$25x^2-625=0$
$n^2-9n+20$
$7+\left(-5\right)-\left(-5\right)+5+\left(-5\right)$
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