$-2a-\frac{1}{3}a+2a$

$\int_0^{\frac{3.1416}{2}}cos\:x\:dx$

$\int-4x\cdot\cos\left(4x\right)dx$

$60,03+1,842-45,7$

$\left(x^2\:+\:1\right)\:\:dx\:+\:\left(x^2\:y^2\right)\:\:dy\:=\:0$

$-a^{m+1}b^{n-2}\:por\:-4a^{m-2}b^{2n+4}$

$2sin\left(4y\right)\frac{dy}{dt}=te^{t^2}$