$6.072+82.4+78.6+124.04$
$\:\frac{\left(an^2+2n\right)}{n^2+4}\left(x+3\right)^n$
$\int_2^4\left(\frac{1}{\sqrt{16-x^2}}\right)dx$
$9+4+10-7$
$\lim_{x\to0}\left(\frac{\left(sin\:8x\right)}{sin\:2x}\right)$
$\int\frac{5}{2x-x^2}dx$
$169m^4n^4-121$
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