$\lim_{x\to4}\left(\frac{\sqrt{x}-4}{x^2-16}\right)$
$\int_0^{2\pi}3\sin\left(x\right)dx$
$3a\:+\:\frac{1}{2}b\:-4\:-b\:-\frac{1}{2}a\:+6$
$5x^3+3y^20$
$\int\frac{x^{10}}{\left(49-x^2\right)^{\frac{13}{2}}}dx$
$\left(-b+5\right)^2$
$\int\left(2senyx\right)dx$
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