$20n^2+13n-15$
$\sin^2x\left(1-\sin^2\left(x\right)\right)$
$-8-4+\left(3+9\right)-2-\left(3-5\right)$
$\frac { 2 } { 3 } + \frac { 1 } { 3 }$
$3x^4+6y^6$
$x^2-20+x\:\frac{x}{5}$
$\int0.06\cdot\left(t+1\right)\cdot0.96^{-t}dt$
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