$-a+b+2a-2c+3a-3b+2c$

$\lim_{x\to\infty}\left(\frac{3x^2-5x}{x^3-2x^2-3}\right)$

$\lim_{x\to\frac{1}{2}}\left(\frac{6x^2-5x-4}{4x^2+16x-9}\right)$

$\left(5x^4y^5-6x^2y^4\right)^2$

$tg^6sec^2x$

$\left(3y^2-x^2\right)dy+\frac{xy}{2}dx$

$\left(\left(\frac{45.33}{1.00104}\right)-1\right)+100$