$2sin^2x-1=\:-sen\:x$
$0.8a^29a-1.3a^2-4a$
$\lim_{x\to\infty}\left(\frac{\ln\left(1+4^x\right)}{\ln\left(1+3^x\right)}\right)$
$\left(p\:+\:7\right)\left(p\:-\:3\right)$
$\int_2^2\frac{x^2}{x^3-2}dx$
$cab+cad$
$\frac{1}{5}ax+\frac{8}{10}ax+1ax$
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