$\int_{-2}^310xdx$

$\lim_{x\to\infty}\left(\frac{1}{x}\cos\left(x^2-3\right)\right)$

$\left(\frac{1}{cos\:x}+\frac{1}{sen\:x}\right)\frac{cos\:x\:-1}{csc\:x\:.\:cos\:x}$

$\int\frac{3}{4x-6}dx$

$3ab-7ab$

$\left(7a^2c+2\right)^2$

$\int\left(\frac{2\cos\left(x\right)}{\sqrt{4-4\sin^2\left(x\right)}}\right)dx$