$\left(n+3\right)+\left(n+5\right)$
$\frac{16x^5-8x^3+20x}{4x}$
$-220+250-200-330+170+140-170$
$\left(-3\right)\left(-5\right)+\left(+14\right)$
$\log\left(5x+10\right)+3$
$\int_0^{\infty}e^{-3x}\sin\left(wx\right)dx$
$\frac{2+\cot^2a}{\:\csc^2a}-1=\sin^2a$
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