$\int\left(2x+1\right)^5\cdot dx$

$\left(6x^2-4y\right)\left(6x^2+13x\right)$

$\int\frac{\sin\left(e\right)}{\cos^2\left(e\right)}de$

$\int\left(\frac{1}{\left(21-0.75\cdot q\right)\cdot\left(15-0.25\cdot q\right)}\right)dq$

$4m^2+12m+9$

$3^2\:.\:5\:+3\left(2-4\right)-6$

$-\:43\:-\:\left(-43\right)\:$