$2\left(3c\right)\left(-b\right)$

$\int_1^5\left(\left(x+1\right)-\left(\frac{25}{x^2}+x\right)\right)dx$

$\int\frac{1}{3+5cos\left(x\right)}dx$

$\frac{dy}{dx}=2x+2xy^2,\:y\left(0\right)=1$

$4.=-20$

$\frac{y^6}{4}+\frac{1}{2}+\frac{y^6}{4}$

$y'\:=\:6x\:-\:xy\:-\:y\:+\:6$