$\int\left(\frac{e^{x-5}-e^{3+x}}{e^{1-x}}\right)dx$
$\left(2y^2\right)^5$
$7+\left(3-1\right)^2$
$2a^2+a=15$
$\int\left(\frac{x^2+2x-5}{x^2}\right)dx$
$\left(-1\right)^k\frac{k^2-1}{k^2+4}$
$5\left(-5\right)\:+\:8\:-\:\left(-3\right)$
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