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

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

$+5+9+9-7-4-2+8+6+10-2-1+7$

$100 x ( 4 x ^ { 2 } + 5 ) ^ { \frac { 2 } { 2 } }$

$\frac{\csc\left(x\right)}{\sin\left(x\right)}-\frac{\cot\left(x\right)}{tan\left(x\right)}=1$

$\int\:2x\:\cos4x\:dx$

$23,para\:4$