$-6q^4+6q-6q^3$
$\lim_{x\to a}\left(\frac{cosx-cosa}{sin\left(x-a\right)}\right)$
$54.3=\frac{x^2}{\left(0.15-x\right)\left(0.09-x\right)}$
$5x\:si\:x=0$
$\frac{cos\:a.\:sec\:a}{tan\:a}=cot\:a$
$\left(-12\cdot5\right)+\left(\frac{54}{9}\right)$
$\int_1^2\left(xe^{-x}\right)dx$
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