$36+21c^2-132c$
$-324+2000$
$\int3\cot^2\left(2x\right)-2\csc^2\left(3x\right)dx$
$^{\left[\left(-32\right)+\left(-49\right)\right]}+\left[\left(+78\right)-\left(-28\right)-\left(-83\right)\right]$
$\int_1^{ln\left(x\right)}sin\left(t\right)dx$
$4a^3b^4\:x\:3a^2b^3$
$\frac{1+sen\left(2x\right)+cos\left(2x\right)}{1+sen\left(2x\right)-cos\left(2x\right)}$
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