$\int\left(10x^4-2sec\left(x^2\right)x\right)dt$

$\lim_{x\to infinito}\left(\frac{2}{\sqrt{\left(x^2+1\right)}}\right)$

$\frac{\left(\sqrt[4]{x}+\sqrt[4]{y}\right)^2-\left(\sqrt[4]{x}+\sqrt[4]{y}\right)^2}{\sqrt[4]{xy}}$

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

$\int\left(\frac{9x^2-8x+1}{\left(6x^3-8x^2+2x-1\right)^2}\right)dx$

$9x^3-6x^2+9x-6$

$\left(12a^5-6a-10a^3\right)-\left(10a-2a^5-14a^4\right)$