$\lim_{x\to-3}2x^2+4x+1$
$3000\left(1.0314\right)^4$
$\lim_{t\to infinity}\left(\frac{-1}{ln\left(t\right)}\right)$
$\frac{sin}{1+cos\left(a\right)-sec\left(a\right)}$
$\left(a+b+c-d\right)-\left(-a-b+c-d\right)$
$-30x^2+1400x-1000$
$a^8-a^4$
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