$cos^4a\:-\:sin^4a\:+\:1=2\cos^2a$
$\int in2x^2dx$
$\int_2^8\frac{d}{\sqrt{r}}$
$\frac{ds}{dt}=2-\frac{4s}{100+t}$
$\left(z^3-4\right)\left(z^3-4\right)$
$\int_{-1}^0\left(xe^x\right)dx$
$\left(8d-1\right)^2$
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