$10.29\cdot3$
$\frac{cos\:a\:+sin\:a}{cos\:a\:-sin\:a}=\frac{1+tan\:a}{1-tan\:a}$
$\int_0^{\infty}\left(e^{1-x}\right)dx$
$2x^5\:-\:54x^2$
$\left(36y^2+12y+1\right)\left(y+1\right)$
$xy'+y=4xlnx,\:y\left(1\right)=1$
$5-\left(-12\right)$
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