$\frac{sin\:\theta}{1+cos\:\theta}+\:\frac{1+cos\:\theta}{sin\:\theta}$
$y'=4y^2x^3,\:y\left(0\right)=1$
$x^2+28x+28$
$49x^b+14x^{6y+64y^2}$
$\int_{\infty}^4\left(4x^2\right)dx$
$\sqrt{x^2+y^2}=25$
$\int_{\pi\:}^{0\:}\:tanx\:dx$
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