$\int\frac{4x^{3}+2x}{x^{4}+x^{2}}dx$

$tan\left(x\right)^2=sin\left(x\right)^2tan\left(x\right)^2+1+cos\left(x\right)^2$

$\frac{a^{-2}b^3}{a^3b^{-4}}$

$\int sin\left(4y\right)sin\left(6y\right)dy$

$\frac{89.3}{120}$

$\int\left(-16e^t\right)dt$

$3x^4+20x^3+28x^2+16x+5$