$\sin\left(x\right)=.9$
$366-242$
$10ab^2+20ab^3+30a^2b^3$
$\frac{d}{dx}x^2+4xy-5y^2=5$
$-3\left(4x+3\right)+4\left(6x+1\right)=43$
$3x^2-x+10$
$\lim_{n\to\infty}\left(\sqrt{n^2+2n^3}-\left(n^2+n\right)\right)$
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