$\int10sen\left(10x\right)cos^5\left(10x\right)dx$

$7\cdot\left(\frac{23}{3}x+\frac{7}{15}\right)^2$

$5x^5-25x^4-50x^3+75x^2+15x$

$\int\sqrt{x}\left(2x+1\right)dx$

$18x+12$

$\lim_{x\to2}\left(\frac{\left(2^x-4\right)}{2-x}\right)$

$\left(-1\right)\cdot\left(-7\right)\cdot\left(4\right)\cdot\left(-5\right)$